Preface |
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vii | |
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1 | (35) |
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1 | (2) |
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2. Basic concepts of abstract graphs |
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3 | (10) |
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3 | (3) |
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6 | (2) |
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8 | (3) |
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11 | (1) |
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12 | (1) |
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13 | (4) |
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4. Some important classes of graphs |
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17 | (6) |
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17 | (2) |
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4.2. Separable and nonseparable graphs |
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19 | (3) |
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22 | (1) |
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23 | (9) |
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24 | (3) |
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5.2. Directed-edge sequence |
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27 | (2) |
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5.3. Outgoing and incoming degrees |
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29 | (1) |
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5.4. Strongly-connected directed graphs |
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30 | (1) |
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5.5. Some important classes of directed graphs |
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31 | (1) |
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32 | (1) |
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32 | (1) |
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33 | (3) |
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CHAPTER 2. Foundations of electrical network theory |
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36 | (104) |
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1. Matrices and directed graphs |
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37 | (21) |
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1.1. The node-edge incidence matrix |
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37 | (4) |
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1.2. The circuit-edge incidence matrix |
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41 | (5) |
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1.3. The cut-edge incidence matrix |
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46 | (7) |
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1.4. Interrelationships among the matrices A, Bf, and Qf |
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53 | (4) |
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1.5. Vector spaces associated with the matrices Ba and Qa |
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57 | (1) |
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2. The electrical network problem |
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58 | (4) |
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3. Solutions of the electrical network problem |
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62 | (15) |
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3.1. Branch-current and branch-voltage systems of equations |
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63 | (1) |
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3.2. Loop system of equations |
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63 | (7) |
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3.3. Cut system of equations |
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70 | (6) |
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3.4. Additional considerations |
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76 | (1) |
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4. Invariance and mutual relations of network determinants and the generalized cofactors |
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77 | (30) |
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77 | (1) |
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4.2. Preliminary considerations |
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78 | (5) |
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4.3. The loop and cut transformations |
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83 | (2) |
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85 | (10) |
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4.5. Generalized cofactors of the elements of the network matrix |
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95 | (12) |
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5. Invariance and the incidence functions |
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107 | (4) |
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6. Topological formulas for RLC networks |
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111 | (14) |
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6.1. Network determinants and trees and cotrees |
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111 | (3) |
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6.2. Generalized cofactors and 2-trees and 2-cotrees |
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114 | (8) |
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6.3. Topological formulas for RLC two-port networks |
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122 | (3) |
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7. The existence and uniqueness of the network solutions |
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125 | (7) |
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132 | (1) |
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133 | (7) |
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CHAPTER 3. Directed-graph solutions of linear algebraic equations |
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140 | (84) |
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1. The associated Coates graph |
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141 | (26) |
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1.1. Topological evaluation of determinants |
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142 | (4) |
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1.2. Topological evaluation of cofactors |
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146 | (3) |
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1.3. Topological solutions of linear algebraic equations |
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149 | (6) |
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1.4. Equivalence and transformations |
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155 | (12) |
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2. The associated Mason graph |
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167 | (20) |
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2.1. Topological evaluation of the determinants |
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169 | (3) |
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2.2. Topological evaluation of cofactors |
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172 | (2) |
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2.3. Topological solutions of linear algebraic equations |
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174 | (3) |
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2.4. Equivalence and transformations |
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177 | (12) |
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3. The modifications of Coates and Mason graphs |
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189 | (10) |
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3.1. Modifications of Coates graphs |
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189 | (8) |
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3.2. Modifications of Mason graphs |
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197 | (2) |
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4. The generation of subgraphs of a directed graph |
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199 | (7) |
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4.1. The generation of 1-factors and 1-factorial connections |
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201 | (2) |
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4.2. The generation of semifactors and k-semifactors |
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203 | (3) |
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5. The eigenvalue problem |
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206 | (4) |
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210 | (6) |
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216 | (1) |
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216 | (8) |
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CHAPTER 4. Topological analysis of linear systems |
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224 | (96) |
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1. The equicofactor matrix |
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225 | (5) |
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2. The associated directed graph |
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230 | (21) |
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2.1. Directed-trees and first-order cofactors |
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231 | (13) |
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2.2. Directed 2-trees and second-order cofactors |
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244 | (7) |
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3. Equivalence and transformations |
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251 | (11) |
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4. The associated directed graph and the Coates graph |
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262 | (7) |
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4.1. Directed trees, 1-factors, and semifactors |
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262 | (4) |
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4.2. Directed 2-trees, 1-factorial connections, and 1-semifactors |
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266 | (3) |
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5. Generation of directed trees and directed 2-trees |
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269 | (12) |
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5.1. Algebraic formulation |
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269 | (3) |
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272 | (7) |
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279 | (2) |
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6. Direct analysis of electrical networks |
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281 | (30) |
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6.1. Open-circuit transfer-impedance and voltage-gain functions |
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281 | (8) |
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6.2. Short-circuit transfer-admittance and current-gain functions |
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289 | (5) |
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6.3. Open-circuit impedance and short-circuit admittance matrices |
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294 | (3) |
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6.4. The physical significance of the associated directed graph |
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297 | (5) |
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6.5. Direct analysis of the associated directed graph |
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302 | (9) |
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311 | (1) |
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312 | (8) |
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CHAPTER 5. Trees and their generation |
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320 | (78) |
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1. The characterizations of a tree |
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320 | (5) |
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2. The codifying of a tree-structure |
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325 | (5) |
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2.1. Codification by paths |
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326 | (2) |
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2.2. Codification by terminal edges |
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328 | (2) |
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3. Decomposition into paths |
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330 | (2) |
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4. The Wang-algebra formulation |
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332 | (21) |
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333 | (1) |
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334 | (4) |
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338 | (2) |
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4.4. Multi-trees and multi-cotrees |
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340 | (5) |
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345 | (8) |
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5. Generation of trees by decomposition without duplications |
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353 | (12) |
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5.1. Essential complementary partitions of a set |
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353 | (3) |
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356 | (3) |
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5.3. Decomposition without duplications |
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359 | (6) |
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6. The matrix formulation |
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365 | (8) |
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6.1. The enumeration of major submatrices of an arbitrary matrix |
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365 | (3) |
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368 | (2) |
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6.3. Directed trees and directed 2-trees |
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370 | (3) |
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7. Elementary transformations |
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373 | (6) |
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8. Hamilton circuits in directed-tree graphs |
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379 | (5) |
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9. Directed trees and directed Euler lines |
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384 | (5) |
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389 | (1) |
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390 | (8) |
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CHAPTER 6. The realizability of directed graphs with prescribed degrees |
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398 | (66) |
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1. Existence and realization as a (p, s)-digraph |
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398 | (29) |
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1.1 Directed graphs and directed bipartite graphs |
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400 | (1) |
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401 | (12) |
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1.3. A simple algorithm for the realization |
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413 | (6) |
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1.4. Degree invariant transformations |
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419 | (3) |
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1.5. Realizability as a connected (p, s)-digraph |
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422 | (5) |
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2. Realizability as a symmetric (p, s)-digraph |
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427 | (13) |
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428 | (5) |
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433 | (3) |
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2.3. Realizability as connected, separable and nonseparable graphs |
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436 | (4) |
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3. Unique realizability of graphs without self-loops |
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440 | (8) |
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3.1. Preliminary considerations |
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441 | (2) |
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3.2. Unique realizability as a connected graph |
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443 | (3) |
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3.3. Unique realizability as a graph |
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446 | (2) |
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4. Existence and realization of a (p, s)-matrix |
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448 | (4) |
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5. Realizability as a weighted directed graph |
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452 | (2) |
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454 | (1) |
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455 | (9) |
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CHAPTER 7. State equations of networks |
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464 | (54) |
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1. State equations in normal form |
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464 | (8) |
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2. Procedures for writing the state equations |
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472 | (8) |
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3. The explicit form of the state equation |
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480 | (10) |
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4. An alternative representation of the state equation |
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490 | (1) |
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5. Physical interpretations of the parameter matrices |
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491 | (8) |
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499 | (15) |
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6.1. Relations between det H(s) and network determinant |
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504 | (4) |
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508 | (3) |
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511 | (3) |
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514 | (1) |
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515 | (3) |
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CHAPTER 8. Squaring rectangles and layouts |
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518 | (94) |
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518 | (3) |
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521 | (3) |
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3. The electrical network associated with a dissected rectangle |
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524 | (11) |
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4. Characterization of the c-nets and c-digraphs |
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535 | (6) |
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5. Perfect subdivison of the general rectangle |
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541 | (12) |
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5.1. The perfect rectangles Rn |
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542 | (2) |
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5.2. The perfect square Sn |
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544 | (7) |
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5.3. Sequence of perfect squares |
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551 | (2) |
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6. Extension to perfect rectangular parallelepiped |
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553 | (1) |
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554 | (51) |
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7.1. The zero wasted area floorplan with continuous aspect ratios |
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557 | (17) |
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7.2. Solving the nonlinear nodal equations |
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574 | (7) |
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7.3. Floorplan area optimization with constrained aspect ratio |
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581 | (15) |
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7.4. From digraphs to layout |
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596 | (2) |
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7.5. Graph-theoretic characterization of the minimum area layout |
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598 | (7) |
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605 | (2) |
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607 | (5) |
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CHAPTER 9. Graphical matrices |
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612 | (59) |
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1. Totally unimodular matrix |
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612 | (16) |
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2. Regular and binary matrices |
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628 | (11) |
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3. Circuit and cutset matrices |
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639 | (14) |
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653 | (3) |
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656 | (8) |
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664 | (1) |
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665 | (6) |
Bibliography |
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671 | (13) |
Symbol index |
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684 | (6) |
Subject index |
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690 | |