Introduction |
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1 | (2) |
Part One Fundamental Properties of Invariant Subspaces and Applications |
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3 | (290) |
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Chapter One Invariant Subspaces: Definition, Examples, and First Properties |
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5 | (40) |
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1.1 Definition and Examples |
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5 | (5) |
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1.2 Eigenvalues and Eigenvectors |
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10 | (2) |
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12 | (4) |
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1.4 Invariant Subspaces and Basic Operations on Linear Transformations |
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16 | (4) |
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1.5 Invariant Subspaces and Projectors |
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20 | (5) |
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1.6 Angular Transformations and Matrix Quadratic Equations |
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25 | (3) |
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1.7 Transformations in Factor Spaces |
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28 | (3) |
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1.8 The Lattice of Invariant Subspaces |
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31 | (6) |
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1.9 Triangular Matrices and Complete Chains of Invariant Subspaces |
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37 | (3) |
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40 | (5) |
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Chapter Two Jordan Form and Invariant Subspaces |
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45 | (60) |
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45 | (7) |
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2.2 The Jordan Form and Partial Multiplicities |
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52 | (6) |
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2.3 Proof of the Jordan Form |
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58 | (2) |
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60 | (5) |
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2.5 Irreducible Invariant Subspaces and Unicellular Transformations |
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65 | (4) |
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2.6 Generators of Invariant Subspaces |
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69 | (3) |
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2.7 Maximal Invariant Subspace in a Given Subspace |
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72 | (6) |
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2.8 Minimal Invariant Subspace over a Given Subspace |
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78 | (5) |
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2.9 Marked Invariant Subspaces |
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83 | (2) |
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2.10 Functions of Transformations |
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85 | (7) |
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2.11 Partial Multiplicities and Invariant Subspaces of Functions of Transformations |
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92 | (3) |
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95 | (10) |
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Chapter Three Coinvariant and Semiinvariant Subspaces |
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105 | (16) |
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3.1 Coinvariant Subspaces |
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105 | (4) |
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109 | (3) |
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3.3 Semiinvariant Subspaces |
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112 | (4) |
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3.4 Special Classes of Transformations |
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116 | (3) |
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119 | (2) |
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Chapter Four Jordan Form for Extensions and Completions |
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121 | (23) |
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4.1 Extensions from an Invariant Subspace |
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121 | (7) |
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4.2 Completions from a Pair of Invariant and Coinvariant Subspaces |
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128 | (5) |
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4.3 The Sigal Inequalities |
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133 | (3) |
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4.4 Special Case of Completions |
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136 | (6) |
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142 | (2) |
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Chapter Five Applications to Matrix Polynomials |
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144 | (45) |
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5.1 Linearizations, Standard Triples, and Representations of Monic Matrix Polynomials |
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144 | (9) |
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5.2 Multiplication of Monic Matrix Polynomials and Partial Multiplicities of a Product |
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153 | (3) |
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5.3 Divisibility of Monic Matrix Polynomials |
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156 | (5) |
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5.4 Proof of Theorem 5.3.2 |
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161 | (6) |
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167 | (4) |
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5.6 Factorization into Several Factors and Chains of Invariant Subspaces |
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171 | (4) |
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5.7 Differential Equations |
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175 | (5) |
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180 | (3) |
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183 | (6) |
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Chapter Six Invariant Subspaces for Transformations Between Different Spaces |
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189 | (23) |
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6.1 [ A B]-Invariant Subspaces |
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189 | (3) |
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192 | (5) |
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6.3 Analysis of the Brunovsky Canonical Form |
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197 | (3) |
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6.4 Description of [ A B]-Invariant Subspaces |
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200 | (3) |
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6.5 The Spectral Assignment Problem |
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203 | (4) |
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207 | (2) |
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209 | (3) |
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Chapter Seven Rational Matrix Functions |
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212 | (50) |
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7.1 Realizations of Rational Matrix Functions |
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212 | (6) |
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7.2 Partial Multiplicities and Multiplication |
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218 | (7) |
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7.3 Minimal Factorization of Rational Matrix Functions |
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225 | (5) |
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230 | (4) |
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7.5 Minimal Factorizations into Several Factors and Chains of Invariant Subspaces |
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234 | (4) |
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7.6 Linear Fractional Transformations |
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238 | (6) |
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7.7 Linear Fractional Decompositions and Invariant Subspaces of Nonsquare Matrices |
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244 | (7) |
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7.8 Linear Fractional Decompositions: Further Deductions |
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251 | (4) |
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255 | (7) |
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Chapter Eight Linear Systems |
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262 | (28) |
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8.1 Reductions, Dilations, and Transfer Functions |
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262 | (3) |
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8.2 Minimal Linear Systems: Controllability and Observability |
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265 | (5) |
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8.3 Cascade Connections of Linear Systems |
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270 | (4) |
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8.4 The Disturbance Decoupling Problem |
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274 | (5) |
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8.5 The Output Stabilization Problem |
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279 | (6) |
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285 | (5) |
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290 | (3) |
Part Two Algebraic Properties of Invariant Subspaces |
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293 | (92) |
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Chapter Nine Commuting Matrices and Hyperinvariant Subspaces |
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295 | (21) |
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295 | (6) |
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9.2 Common Invariant Subspaces for Commuting Matrices |
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301 | (2) |
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9.3 Common Invariant Subspaces for Matrices with Rank 1 Commutators |
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303 | (2) |
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9.4 Hyperinvariant Subspaces |
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305 | (2) |
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9.5 Proof of Theorem 9.4.2 |
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307 | (4) |
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9.6 Further Properties of Hyperinvariant Subspaces |
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311 | (2) |
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313 | (3) |
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Chapter Ten Description of Invariant Subspaces and Linear Transformations with the Same Invariant Subspaces |
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316 | (23) |
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10.1 Description of Irreducible Subspaces |
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316 | (7) |
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10.2 Transformations Having the Same Set of Invariant Subspaces |
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323 | (5) |
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10.3 Proof of Theorem 10.2.1 |
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328 | (10) |
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338 | (1) |
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Chapter Eleven Algebras of Matrices and Invariant Subspaces |
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339 | (20) |
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11.1 Finite-Dimensional Algebras |
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339 | (1) |
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11.2 Chains of Invariant Subspaces |
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340 | (3) |
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11.3 Proof of Theorem 11.2.1 |
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343 | (3) |
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346 | (4) |
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11.5 Reductive and Self-Adjoint Algebras |
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350 | (5) |
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355 | (4) |
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Chapter Twelve Real Linear Transformations |
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359 | (25) |
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12.1 Definition, Examples, and First Properties of Invariant Subspaces |
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359 | (4) |
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12.2 Root Subspaces and the Real Jordan Form |
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363 | (3) |
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12.3 Complexification and Proof of the Real Jordan Form |
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366 | (5) |
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371 | (3) |
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12.5 Hyperinvariant Subspaces |
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374 | (4) |
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12.6 Real Transformations with the Same Invariant Subspaces |
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378 | (2) |
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380 | (4) |
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384 | (1) |
Part Three Topological Properties of Invariant Subspaces and Stability |
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385 | (178) |
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Chapter Thirteen The Metric Space of Subspaces |
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387 | (36) |
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13.1 The Gap Between Subspaces |
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387 | (5) |
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13.2 The Minimal Angle and the Spherical Gap |
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392 | (4) |
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13.3 Minimal Opening and Angular Linear Transformations |
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396 | (4) |
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13.4 The Metric Space of Subspaces |
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400 | (6) |
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13.5 Kernels and Images of Linear Transformations |
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406 | (2) |
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13.6 Continuous Families of Subspaces |
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408 | (3) |
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13.7 Applications to Generalized Inverses |
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411 | (4) |
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13.8 Subspaces of Normed Spaces |
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415 | (5) |
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420 | (3) |
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Chapter Fourteen The Metric Space of Invariant Subspaces |
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423 | (21) |
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14.1 Connected Components: The Case of One Eigenvalue |
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423 | (3) |
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14.2 Connected Components: The General Case |
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426 | (2) |
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14.3 Isolated Invariant Subspaces |
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428 | (4) |
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14.4 Reducing Invariant Subspaces |
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432 | (5) |
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14.5 Coinvariant and Semiinvariant Subspaces |
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437 | (2) |
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439 | (4) |
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443 | (1) |
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Chapter Fifteen Continuity and Stability of Invariant Subspaces |
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444 | (38) |
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15.1 Sequences of Invariant Subspaces |
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444 | (3) |
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15.2 Stable Invariant Subspaces: The Main Result |
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447 | (4) |
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15.3 Proof of Theorem 15.2.1 in the General Case |
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451 | (4) |
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15.4 Perturbed Stable Invariant Subspaces |
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455 | (4) |
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15.5 Lipschitz Stable Invariant Subspaces |
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459 | (4) |
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15.6 Stability of Lattices of Invariant Subspaces |
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463 | (1) |
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15.7 Stability in Metric of the Lattice of Invariant Subspaces |
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464 | (4) |
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15.8 Stability of [ A B]-Invariant Subspaces |
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468 | (2) |
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15.9 Stable Invariant Subspaces for Real Transformations |
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470 | (5) |
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15.10 Partial Multiplicities of Close Linear Transformations |
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475 | (4) |
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479 | (3) |
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Chapter Sixteen Perturbations of Lattices of Invariant Subspaces with Restrictions on the Jordan Structure |
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482 | (32) |
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16.1 Preservation of Jordan Structure and Isomorphism of Lattices |
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482 | (4) |
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16.2 Properties of Linear Isomorphisms of Lattices: The Case of Similar Transformations |
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486 | (6) |
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16.3 Distance Between Invariant Subspaces for Transformations with the Same Jordan Structure |
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492 | (5) |
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16.4 Transformations with the Same Derogatory Jordan Structure |
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497 | (3) |
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16.5 Proofs of Theorems 16.4.1 and 16.4.4 |
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500 | (7) |
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16.6 Distance between Invariant Subspaces for Transformations with Different Jordan Structures |
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507 | (3) |
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510 | (3) |
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513 | (1) |
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Chapter Seventeen Applications |
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514 | (47) |
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17.1 Stable Factorizations of Matrix Polynomials: Preliminaries |
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514 | (6) |
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17.2 Stable Factorizations of Matrix Polynomials: Main Results |
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520 | (5) |
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17.3 Lipschitz Stable Factorizations of Monic Matrix Polynomials |
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525 | (3) |
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17.4 Stable Minimal Factorizations of Rational Matrix Functions: The Main Result |
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528 | (4) |
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17.5 Proof of the Auxiliary Lemmas |
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532 | (5) |
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17.6 Stable Minimal Factorizations of Rational Matrix Functions: Further Deductions |
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537 | (3) |
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17.7 Stability of Linear Fractional Decompositions of Rational Matrix Functions |
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540 | (5) |
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17.8 Isolated Solutions of Matrix Quadratic Equations |
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545 | (6) |
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17.9 Stability of Solutions of Matrix Quadratic Equations |
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551 | (2) |
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553 | (4) |
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557 | (4) |
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561 | (2) |
Part Four Analytic Properties of Invariant Subspaces |
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563 | (83) |
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Chapter Eighteen Analytic Families of Subspaces |
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565 | (39) |
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18.1 Definition and Examples |
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565 | (4) |
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18.2 Kernel and Image of Analytic Families of Transformations |
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569 | (6) |
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18.3 Global Properties of Analytic Families of Subspaces |
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575 | (3) |
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18.4 Proof of Theorem 18.3.1 (Compact Sets) |
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578 | (6) |
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18.5 Proof of Theorem 18.3.1 (General Case) |
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584 | (6) |
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18.6 Direct Complements for Analytic Families of Subspaces |
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590 | (4) |
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18.7 Analytic Families of Invariant Subspaces |
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594 | (2) |
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18.8 Analytic Dependence of the Set of Invariant Subspaces and Fixed Jordan Structure |
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596 | (3) |
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18.9 Analytic Dependence on a Real Variable |
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599 | (2) |
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601 | (3) |
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Chapter Nineteen Jordan Form of Analytic Matrix Functions |
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604 | (20) |
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19.1 Local Behaviour of Eigenvalues and Eigenvectors |
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604 | (3) |
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19.2 Global Behaviour of Eigenvalues and Eigenvectors |
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607 | (6) |
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19.3 Proof of Theorem 19.2.3 |
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613 | (3) |
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19.4 Analytic Extendability of Invariant Subspaces |
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616 | (4) |
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19.5 Analytic Matrix Functions of a Real Variable |
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620 | (2) |
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622 | (2) |
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Chapter Twenty Applications |
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624 | (21) |
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20.1 Factorization of Monic Matrix Polynomials |
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624 | (3) |
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20.2 Rational Matrix Functions Depending Analytically on a Parameter |
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627 | (7) |
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20.3 Minimal Factorizations of Rational Matrix Functions |
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634 | (5) |
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20.4 Matrix Quadratic Equations |
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639 | (3) |
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642 | (3) |
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645 | (1) |
Appendix. Equivalence of Matrix Polynomials |
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646 | (33) |
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A.1 The Smith Form: Existence |
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646 | (5) |
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A.2 The Smith Form: Uniqueness |
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651 | (3) |
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A.3 Invariant Polynomials, Elementary Divisors, and Partial Multiplicities |
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654 | (5) |
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A.4 Equivalence of Linear Matrix Polynomials |
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659 | (3) |
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A.5 Strict Equivalence of Linear Matrix Polynomials: Regular Case |
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662 | (4) |
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A.6 The Reduction Theorem for Singular Polynomials |
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666 | (6) |
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A.7 Minimal Indices and Strict Equivalence of Linear Matrix Polynomials (General Case) |
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672 | (6) |
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A.8 Notes to the Appendix |
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678 | (1) |
List of Notations and Conventions |
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679 | (4) |
References |
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683 | (4) |
Author Index |
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687 | (2) |
Subject Index |
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689 | |