Preface |
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xvii | |
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1 Normed linear spaces and their operators |
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1 | (59) |
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1 | (8) |
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9 | (5) |
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14 | (1) |
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1.4 The Hahn--Banach theorem |
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15 | (6) |
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1.5 The Baire category theorem and its consequences |
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21 | (5) |
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26 | (4) |
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1.7 Hilbert space and projections |
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30 | (10) |
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40 | (5) |
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1.9 Tensor product and algebraic direct sum |
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45 | (4) |
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1.10 Invariant subspaces and cyclic vectors |
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49 | (3) |
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1.11 Compressions and dilations |
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52 | (2) |
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1.12 Angle between two subspaces |
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54 | (6) |
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57 | (3) |
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2 Some families of operators |
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60 | (36) |
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2.1 Finite-rank operators |
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60 | (2) |
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62 | (3) |
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2.3 Subdivisions of spectrum |
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65 | (5) |
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2.4 Self-adjoint operators |
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70 | (7) |
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77 | (1) |
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2.6 Normal and unitary operators |
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78 | (2) |
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2.7 Forward and backward shift operators on l2 |
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80 | (3) |
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2.8 The multiplication operator on L2(μ) |
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83 | (3) |
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2.9 Doubly infinite Toeplitz and Hankel matrices |
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86 | (10) |
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92 | (4) |
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3 Harmonic functions on the open unit disk |
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96 | (26) |
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3.1 Nontangential boundary values |
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96 | (2) |
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98 | (3) |
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3.3 Some well-known facts in measure theory |
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101 | (5) |
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3.4 Boundary behavior of Pμ |
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106 | (4) |
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110 | (2) |
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3.6 Boundary behavior of Qμ |
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112 | (1) |
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113 | (3) |
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3.8 Subharmonic functions |
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116 | (1) |
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3.9 Some applications of Green's formula |
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117 | (5) |
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120 | (2) |
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122 | (44) |
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122 | (2) |
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4.2 Classic Hardy spaces Hp |
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124 | (6) |
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4.3 The Riesz projection P+ |
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130 | (5) |
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135 | (2) |
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4.5 Dual and predual of Hp spaces |
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137 | (4) |
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4.6 The canonical factorization |
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141 | (7) |
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4.7 The Schwarz reflection principle for H1 functions |
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148 | (1) |
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4.8 Properties of outer functions |
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149 | (5) |
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154 | (3) |
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4.10 More on the norm in Hp |
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157 | (9) |
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163 | (3) |
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166 | (48) |
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5.1 The Nevanlinna class N |
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166 | (5) |
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171 | (2) |
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173 | (8) |
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5.4 The algebra C(T) + H∞ |
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181 | (2) |
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5.5 Generalized Hardy spaces Hp(ν) |
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183 | (4) |
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187 | (11) |
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5.7 Equivalent norms on H2 |
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198 | (4) |
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202 | (12) |
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211 | (3) |
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6 Extreme and exposed points |
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214 | (43) |
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214 | (3) |
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6.2 Extreme points of Lp(T) |
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217 | (2) |
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219 | (5) |
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224 | (3) |
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6.5 Exposed points of B(Χ) |
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227 | (3) |
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6.6 Strongly exposed points of B(Χ) |
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230 | (2) |
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6.7 Equivalence of rigidity and exposed points in H1 |
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232 | (3) |
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6.8 Properties of rigid functions |
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235 | (11) |
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6.9 Strongly exposed points of H1 |
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246 | (11) |
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254 | (3) |
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7 More advanced results in operator theory |
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257 | (57) |
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7.1 The functional calculus for self-adjoint operators |
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257 | (3) |
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7.2 The square root of a positive operator |
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260 | (9) |
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7.3 Mobius transformations and the Julia operator |
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269 | (5) |
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7.4 The Wold--Kolmogorov decomposition |
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274 | (1) |
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7.5 Partial isometries and polar decomposition |
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275 | (6) |
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7.6 Characterization of contractions on l2(Z) |
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281 | (1) |
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7.7 Densely denned operators |
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282 | (4) |
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286 | (5) |
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7.9 Essential spectrum of block-diagonal operators |
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291 | (7) |
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298 | (8) |
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7.11 The abstract commutant lifting theorem |
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306 | (8) |
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310 | (4) |
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314 | (62) |
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8.1 The bilateral forward shift operator Zμ |
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314 | (7) |
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8.2 The unilateral forward shift operator S |
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321 | (7) |
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8.3 Commutants of Z and S |
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328 | (5) |
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333 | (3) |
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8.5 When do we have Hp(μ) = Lp(μ)? |
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336 | (6) |
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8.6 The unilateral forward shift operator Sμ |
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342 | (9) |
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8.7 Reducing invariant subspaces of Zμ |
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351 | (2) |
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8.8 Simply invariant subspaces of Zμ |
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353 | (7) |
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8.9 Reducing invariant subspaces of Sμ |
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360 | (1) |
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8.10 Simply invariant subspaces of Sμ |
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361 | (2) |
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8.11 Cyclic vectors of Zμ and S* |
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363 | (13) |
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372 | (4) |
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9 Analytic reproducing kernel Hilbert spaces |
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376 | (23) |
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9.1 The reproducing kernel |
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376 | (5) |
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381 | (2) |
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9.3 The Banach algebra Mult(H) |
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383 | (3) |
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386 | (4) |
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9.5 The abstract forward shift operator SH |
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390 | (2) |
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392 | (2) |
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9.7 When do we have Mult(H) = H∞? |
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394 | (2) |
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9.8 Invariant subspaces of SH |
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396 | (3) |
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396 | (3) |
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10 Bases in Banach spaces |
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399 | (55) |
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399 | (4) |
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403 | (8) |
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10.3 The multipliers of a sequence |
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411 | (3) |
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10.4 Symmetric, nonsymmetric and unconditional basis |
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414 | (8) |
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422 | (3) |
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10.6 The mappings Jx, Vx and Γx |
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425 | (5) |
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10.7 Characterization of the Riesz basis |
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430 | (5) |
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10.8 Bessel sequences and the Feichtinger conjecture |
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435 | (5) |
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10.9 Equivalence of Riesz and unconditional bases |
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440 | (2) |
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10.10 Asymptotically orthonormal sequences |
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442 | (12) |
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449 | (5) |
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454 | (27) |
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11.1 A matrix representation for Hφ |
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454 | (3) |
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457 | (5) |
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11.3 Hilbert's inequality |
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462 | (4) |
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466 | (4) |
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11.5 More approximation problems |
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470 | (3) |
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11.6 Finite-rank Hankel operators |
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473 | (2) |
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11.7 Compact Hankel operators |
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475 | (6) |
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478 | (3) |
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481 | (45) |
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12.1 The operator Tφ (H2) |
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481 | (6) |
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12.2 Composition of two Toeplitz operators |
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487 | (3) |
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490 | (4) |
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494 | (5) |
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499 | (1) |
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12.6 Characterization of rigid functions |
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500 | (3) |
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12.7 Toeplitz operators on H2(μ) |
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503 | (3) |
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12.8 The Riesz projection on L2(μ) |
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506 | (5) |
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12.9 Characterization of invertibility |
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511 | (4) |
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12.10 Fredholm Toeplitz operators |
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515 | (3) |
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12.11 Characterization of subjectivity |
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518 | (2) |
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12.12 The operator XH and its invariant subspaces |
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520 | (6) |
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522 | (4) |
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13 Cauchy transform and Clark measures |
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526 | (41) |
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526 | (7) |
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13.2 Boundary behavior of Cμ |
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533 | (1) |
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534 | (7) |
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13.4 The operator Kφ : L2(φ) → H2 |
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541 | (4) |
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13.5 Functional calculus for Sφ |
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545 | (6) |
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13.6 Toeplitz operators with symbols in L2(T) |
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551 | (4) |
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555 | (7) |
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13.8 The Cauchy transform of μα |
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562 | (1) |
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563 | (4) |
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564 | (3) |
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567 | (44) |
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14.1 The arithmetic of inner functions |
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567 | (3) |
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570 | (6) |
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14.3 The orthogonal projection P |
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576 | (3) |
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579 | (1) |
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14.5 Minimal sequences of reproducing kernels in KB |
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580 | (3) |
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14.6 The operators J and M |
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583 | (6) |
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14.7 Functional calculus for M |
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589 | (4) |
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14.8 Spectrum of M and φ(M) |
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593 | (9) |
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14.9 The commutant lifting theorem for M |
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602 | (5) |
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607 | (4) |
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608 | (3) |
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15 Bases of reproducing kernels and interpolation |
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611 | |
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15.1 Uniform minimality of (kλn)n≥1 |
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611 | (1) |
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15.2 The Carleson--Newman condition |
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612 | (6) |
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15.3 Riesz basis of reproducing kernels |
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618 | (3) |
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15.4 Nevanlinna--Pick interpolation problem |
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621 | (2) |
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15.5 H∞-interpolating sequences |
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623 | (1) |
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15.6 H2-interpolating sequences |
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624 | (3) |
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15.7 Asymptotically orthonormal sequences |
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627 | |
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638 | |
References |
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641 | (28) |
Symbol Index |
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669 | (4) |
Author Index |
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673 | (4) |
Subject Index |
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677 | |
Preface |
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16 The spaces M(A) and H(A) |
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16.2 A characterization of M(A) ⊂ M(B) |
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16.3 Linear functionals on M(A) |
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16.4 The complementary space H(A) |
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16.5 The relation between H(A) and H(A*) |
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16.6 The overlapping space M(A) ∩ H(A) |
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16.7 The algebraic sum of of M(A1) and M(A2) |
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16.8 A decomposition of H(A) |
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16.9 The geometric definition of H(A) |
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16.10 The Julia operator J(A) and H(A) |
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17 Hilbert spaces inside H2 |
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17.5 Relations between different H(b) spaces |
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17.6 M(u) is invariant under S and S* |
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17.7 Contractive inclusion of M(φ) in M(φ) |
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17.8 Similarity of S and SH |
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17.9 Invariant subspaces of Zu and Xu |
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17.10 An extension of Beurling's theorem |
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18 The structure of H(b) and H(b) |
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18.1 When is H(b) a closed subspace of H2? |
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18.2 When is H(b) a dense subset of H2? |
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18.3 Decomposition of H(b) spaces |
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18.4 The reproducing kernel of H(b) |
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18.5 H(b) and H(b) are invariant under Tφ |
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18.6 Some inhabitants of H(b) |
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18.7 The unilateral backward shift operators Xb and Xb |
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18.8 The inequality of difference quotients |
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18.9 A characterization of membership in H(b) |
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19 Geometric representation of H(b) spaces |
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19.1 Abstract functional embedding |
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19.2 A geometric representation H(b) |
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19.3 A unitary operator from Kb onto Kb* |
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19.4 A contraction from H(b) to H(b*) |
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19.5 Almost conformal invariance |
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19.6 The Littlewood Subordination Theorem revisited |
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19.7 The generalized Schwarz--Pick estimates |
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20 Representation theorems for H(b) and H(b) |
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20.1 Integral representation of H(b) |
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20.2 Kρ intertwines S*ρ and Xb |
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20.3 Integral representation of H(b) |
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20.4 A contractive antilinear map on H(b) |
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20.5 Absolutely continuity of the Clark measure |
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20.6 Inner divisors of the Cauchy transform |
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20.7 Vb intertwines S*μ and Xb |
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20.8 Analytic continuation of H(b) functions |
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20.10 Multipliers and Toeplitz operators |
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20.11 Comparison of measures |
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21 Angular derivatives of H(b) functions |
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21.1 Derivative in the sense of Caratheodory |
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21.2 Angular derivatives and Clark measures |
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21.3 Derivatives of Blaschke products |
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21.4 Higher derivatives of b |
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21.5 Approximating by Blaschke products |
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21.6 Reproducing kernels for derivatives |
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21.7 An interpolation problem |
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21.8 Derivatives of H(b) functions |
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22 Bernstein-type inequalities |
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22.1 Passage between D and C+ |
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22.2 Integral representations for derivatives |
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22.4 Some auxiliary integral operators |
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22.6 Distances to the level sets |
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22.7 Carleson-type embedding theorems |
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22.8 A formula of combinatorics |
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22.9 Norm convergence for the reproducing kernels |
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23 H(b) spaces generated by a nonextreme symbol b |
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23.2 Inclusion of M(u) into H(b) |
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23.4 Analytic polynomials are dense in H(b) |
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23.5 A formula for ||Xbf||b |
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23.6 Another representation of H(b) |
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23.7 A characterization of H(b) |
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23.8 More inhabitants of H(b) |
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23.9 Unbounded Toeplitz operators and H(b) spaces |
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24 Operators on H(b) spaces with b nonextreme |
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24.1 The unilateral forward shift operator Sb |
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24.2 A characterization of H∞ ⊂ H(b) |
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24.3 Spectrum of Xb and A*b |
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24.4 Comparison of measures |
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24.7 Invariant subspaces of H(b) under Xb |
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24.8 Completeness of the family of difference quotients |
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25 H(b) spaces generated by an extreme symbol b |
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25.1 A unitary map between H(b) and L2(ρ) |
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25.2 Analytic continuation of f H(b) |
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25.3 Analytic continuation of f H(b) |
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25.4 A formula for ||Xbf||b |
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25.5 S*-cyclic vectors in H(b) and H(b) |
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25.6 Orthogonal decompositions of H(b) |
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25.7 The closure of H(b) in H(b) |
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25.8 A characterization of H(b) |
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26 Operators on H(b) spaces with b extreme |
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26.1 Spectrum of Xb and X*b |
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26.2 Multipliers of H(b) spaces, extreme case, part I |
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26.3 Comparison of measures |
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26.4 Further characterizations of angular derivatives for b |
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26.5 Model operator for Hilbert space contractions |
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26.6 Conjugation and completeness of difference quotients |
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27 Inclusion between two H(b) spaces |
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27.1 A new geometric representation of H(b) spaces |
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27.2 The class I nt(Vb1, Vb2) |
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27.3 The class I nt(lb1, lb2) |
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27.4 Relations between different H(b) spaces |
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27.6 Coincidence between H(b) and D(μ) spaces |
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28 Topics regarding inclusions M(a) ⊂ H(b) ⊂ H(b) |
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28.1 A sufficient and a necessary condition for H(b) = H(b) |
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28.2 Characterizations of H(b) = H(b) |
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28.3 Multipliers of H(b), extreme case, part II |
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28.4 Characterizations of M(a) = H(b) |
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28.5 Invariant subspaces of Sb when b(z) = (1 + z)/2 |
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28.6 Characterization of bM(a) = H(b) |
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28.7 Characterization of the closedness of M(a) in H(b) |
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28.8 Boundary eigenvalues and eigenvectors of Sb* |
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29 Rigid functions and strongly exposed points of H1 |
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29.1 Admissible and special pairs |
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29.2 Rigid functions of H1 and H(b) spaces |
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29.4 Sb-invariant subspaces of H(b) |
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29.5 A necessary condition for nonrigidity |
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29.6 Strongly exposed points and H(b) spaces |
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30 Nearly invariant subspaces and kernels of Toeplitz operators |
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30.1 Nearly invariant subspaces and rigid functions |
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30.4 A characterization of nearly invariant subspaces |
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30.5 Description of kernels of Toeplitz operators |
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30.6 A characterization of subjectivity for Toeplitz operators |
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30.7 The right inverse of a Toeplitz operator |
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31 Geometric properties of sequences of reproducing kernels |
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31.1 Completeness and minimality in H(b) spaces |
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31.2 Spectral properties of rank one perturbation of Xb* |
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31.3 Orthonormal bases in H(b) spaces |
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31.4 Riesz sequences of reproducing kernels in H(b) |
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31.5 The invertibility of distortion operator and Riesz bases |
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31.6 Riesz sequences in H2(μ) and in H(b) |
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31.7 Asymptotically orthonormal sequences and bases in H(b) |
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31.8 Stability of completeness and AOB |
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31.9 Stability of Riesz bases |
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References |
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Symbol Index |
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Subject Index |
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