Abstract

It will be shown that looking at a problem from the viewpoint of matroids enables us to understand the essence of the problem as well as its relations to other problems, clearly, preventing us from probable confusion into which we might have been involved without matroids, and that mathematical techniques developed in matroid theory are powerful for manipulating and solving the mathematical model which would otherwise have been impossible, or at best prohibitively complicated. Examples of problems to be discussed:
  1. 1.

    Topological, geometrical and physical matroids, or faithful and unfaithful representations in terms of matroids

     
  2. 2.

    Elements and their interconnections

     
  3. 3.

    Minimum-size systems of equations

     
  4. 4.

    Structural solvability of systems of equations

     
  5. 5.

    Two kinds of dualities

     

Keywords

Entropy Microwave Transportation Resis Univer 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aigner, M. (1979): Combinatorial Theory. Springer-Verlag.Google Scholar
  2. Amari, S. (1962): Topological foundations of Kron’s tearing of electric networks; Information-theoretical foundations of diakoptics and codiakoptics. RAAG Memoirs, Vol. 3, F-VI; F-VII, pp. 322–350; 351–371.Google Scholar
  3. Asimov, L., and Roth, B. (1978): Rigidity of graphs. Transactions of the American Mathematical Society, Vol. 245, pp. 279–289.MathSciNetCrossRefGoogle Scholar
  4. Asimov, L., and Roth, B. (1979): Rigidity of graphs, II. Journal of Mathematical Analysis and Applications, Vol. 68, pp. 171–190.MathSciNetCrossRefGoogle Scholar
  5. Birkhoff, G. (1935): Sur les espaces discrets. Computes Rendus de l’Academie des Sciences, Paris, Tome 201, pp. 19–20.Google Scholar
  6. Birkhoff, G. (1967): Lattice Theory ( third edition ). American Mathematical Society Colloquium Publications, Providence.Google Scholar
  7. Bixby, R. E. (1981): Hidden structure in linear programs. In Computer-Assisted Analysis and Model Simplification (Greenburg, H. J., and Maybee, J. S., eds. ), Academic Press, pp. 327–360.Google Scholar
  8. Bolker, E. D., and Crapo, H. (1977): How to brace a one-story-building. Environment and Planing B, Vol. 4, pp. 125–152.Google Scholar
  9. Bruno, J., and Weinberg, L. (1970): A constructive graph-theoretic solution of the Shannon switching game. IEEE Transactions on Circuit Theory, Vol. CT-17, pp. 74–81.Google Scholar
  10. Bruno, J., and Weinberg, L. (1971): The principal minors of a matroid. Linear Algebra and Its Applications, Vol. 4, pp. 17–54.MathSciNetMATHCrossRefGoogle Scholar
  11. Bruno, J., and Weinberg, L. (1976): Generalized networks: networks embedded on a matroid, I and II. Networks, Vol. 6, pp. 53–94, pp. 231–272.Google Scholar
  12. Bruter, C. P. (1974): Eléments de la Théorie des Matroïdes. Lecture Notes in Mathematics 387, Springer-Verlag, Berlin.Google Scholar
  13. Bryant, P. R. (1962): The explicit form of Bashkow’s A-matrix. IRE Transactions on Circuit Theory, Vol. CT-9, pp. 303 - 306.Google Scholar
  14. Camerini, P. M., Fratta, L., and Maffioli, F. (1979): A note on finding optimum branchings. Networks, Vol. 9, pp. 309–312.MathSciNetMATHCrossRefGoogle Scholar
  15. Chu, Y.-J., and Liu, T.-H. (1965): On the shortest arborescence of a directed graph. Scientia Sinica, Vol. 14, pp. 1396–1400.MathSciNetMATHGoogle Scholar
  16. Crapo, H. (1979): Structural rigidity. Structural Topology, Vol. 1, pp. 26–45.MathSciNetMATHGoogle Scholar
  17. Crapo, H., and Rota, G.-C. (1971): Combinatorial Geometries. M.I.T. Press.Google Scholar
  18. Csurgay, A., Kovács, Z., and Recski, A. (1974): Transient analysis of lumped-distributed nonlinear networks. Proceedings of the 5 th International Colloquium on Microwave Communication, Budapest.Google Scholar
  19. Dulmage, A. L., and Mendelsohn, N. S. (1958): Coverings of bipartite graphs. Canadian Journal of Mathematics, Vol. 10, pp. 517–534.MathSciNetMATHCrossRefGoogle Scholar
  20. Dulmage, A. L., and Mendelsohn, N. S. (1959): A structure theory of bipartite graphs of finite exterior dimension. Transactions of the Royal Society of Canada, Third Series, Section III, Vol. 53, pp. 1–13.Google Scholar
  21. Dulmage, A. L., and Mendelsohn, N. S. (1962): On the inversion of sparse matrices. Mathematics of Computation, Vol. 16, pp. 494 - 496.MathSciNetMATHCrossRefGoogle Scholar
  22. Dulmage, A. L., and Mendelsohn, N. S. (1963): Two algorithms for bipartite graphs. Journal of the Society of the Industrial and Applied Mathematics, Vol. 11, pp. 183– 194.Google Scholar
  23. Edmonds, J. (1965): Minimum partition of a matroid into independent subsets. Journal of Research of the National Bureau of Standards, Vol. 69 B, pp. 73 - 77.Google Scholar
  24. Edmonds, J. (1967): Optimum branchings. Journal of Research of the National Bureau of Standards, Vol 71B, pp. 233 - 240.MathSciNetMATHGoogle Scholar
  25. Edmonds, J. (1970): Submodular functions, matroids and certain polyhedra. Proceedings of the International Conference on Combinatorial Structures and Their Applications (Guy, R., et al. eds.), Gordon and Breach, New York, pp. 69–87.Google Scholar
  26. Edmonds, J. (1971): Matroids and the greedy algorithm. Mathematical Programming. Vol. 1, pp. 127 - 136.MathSciNetMATHCrossRefGoogle Scholar
  27. Ford, L. R., Jr., and Fulkerson, D. R. (1962): Flows in Networks. Princeton University Press, Princeton, New Jersey.Google Scholar
  28. Fujishige, S. (1977 a): A primal approach to the independent assignment problem. Journal of the Operations Research Society of Japan, Vol. 20, pp. 1–15.Google Scholar
  29. Fujishige, S. (1977 b): An algorithm for finding an optimal independent linkage. Journal of the Operations Research Society of Japan, Vol. 20, pp. 59–75.Google Scholar
  30. Fujishige, S. (1978 a): Algorithms for solving the independent-flow problems. Journal of the Operations Research Society of Japan, Vol. 21, pp. 189–203.Google Scholar
  31. Fujishige, S. (1978 b): Polymatroidal dependence structure of a set of random variables. Information and Control, Vol. 39, pp. 55–72.Google Scholar
  32. Fujishige, S. (1980 a): Principal structures of submodular systems. Discrete Applied Mathematics, Vol. 2, pp. 77 - 79.Google Scholar
  33. Fujishige, S. (1980 b): An efficient PQ-graph algorithm for solving the graph-realization problem. Journal of Computer and System Sciences, Vol. 21, pp. 63–86.Google Scholar
  34. Fujishige, S. (1980 c): Lexicographically optimal base of a polymatroid with respect to a weight vector. Mathematics of Operations Research, Vol. 5, pp. 186–196.Google Scholar
  35. Fujushige, S., Ohkubo, K., and Iri, M. (1978): Optimal flows in a network with several sources and sinks (in Japanese). Proceedings of the 1978 Fall Conference of the Operations Research Society of Japan, A-2, pp. 22–23.Google Scholar
  36. Fulkerson, D. R. (1971): Blocking and anti-blocking pairs of polyhedra. Mathematical Programming, Vol. 1, pp. 168–194.MathSciNetMATHCrossRefGoogle Scholar
  37. Han, T.-S. (1979 a): The capacity region of general multi-access channel with certain correlated sources. Information and Control, Vol. 40, pp. 37–60.Google Scholar
  38. Han, T.-S. (1979 b): Source coding with cross observation at the encoders. IEEE Transactions on Information Theory, Vol. IT-25, pp. 360–361.Google Scholar
  39. Han, T.-S. (1980): Slepian-Wolf-Cover theorem for networks of channels. Information and Control, Vol. 47, pp. 67–83.MathSciNetMATHCrossRefGoogle Scholar
  40. Harary, F., and Welsh, D. (1969): Matroids versus graphs. The Many Facets of Graph Theory, Springer Lecture Notes 110, p. 115.Google Scholar
  41. Hausmann, D., and Korte, B. (1978): Lower bounds on the worst-case complexity of some oracle algorithms. Discrete Mathematics, Vol. 24, pp. 261–276.MathSciNetMATHCrossRefGoogle Scholar
  42. Holzmann, C. A. (1977): Realization of netoids. Proceedings of the 20 th Midwest Symposium on Circuits and Systems, Lubbock, Texas, pp. 394–398.Google Scholar
  43. Holzmann, C. A. (1979): Binary netoids. Proceedings of the International Symposium on Circuits and Systems, Tokyo, pp. 1000–1003.Google Scholar
  44. Imai, H. (1983): Efficient Solutions for Combinatorial Optimization Problems by Means of Network-Flow Algorithms (in Japanese). Master’s Thesis, Department of Mathematical Engineering and Instrumentation Physics, University of Tokyo.Google Scholar
  45. Iri, M. (1962): A necessary and sufficient condition for a matrix to be the loop or cut-set matrix of a graph and a practical method for the topological synthesis of networks. RAAG Research Notes, Third Series, No. 50.Google Scholar
  46. Iri, M. (1966): A criterion for the reducibility of a linear programming problem to a linear network-flow problem. RAAG Research Notes, Third Series, No. 98.Google Scholar
  47. Iri, M. (1968 a): On the synthesis of loop and cutset matrices and the related problems. RAAG Memoirs, Vol. 4, A-XIII, pp. 4-38.Google Scholar
  48. Iri, M. (1968b): A min-max theorem for the ranks and term-ranks of a class of matrices: An algebraic approach to the problem of the topological degrees of freedom of a network (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 51 A, pp. 180 - 187.Google Scholar
  49. Iri, M. ( 1968 c): A critical review of the matroid-theoretical and the algebraic-topological theory of networks. RAAG Memoirs, Vol. IV, Division A, pp. 39 - 46.Google Scholar
  50. Iri, M. ( 1968 d): Metatheoretical considerations on duality. RAAG Research Notes, Third Series, No. 124.Google Scholar
  51. Iri, M. ( 1969 a): Network Flow, Transportation and Scheduling - Theory and Algorithms. Academic Press, New York.Google Scholar
  52. Iri, M. (1969 b): The maximum-rank minimum-term-rank theorem for the pivotal transforms of a matrix. Linear Algebra and Its Applications, Vol. 2, pp. 427–446.Google Scholar
  53. Iri, M. (1971): Combinatorial canonical form of a matrix with applications to the principal partition of a graph (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 54 A, pp. 30–37.Google Scholar
  54. Iri, M. (1978): A practical algorithm for the Menger-type generalization of the independent assignment problem. Mathematical Programming Study, Vol. 8, pp. 88–105.MathSciNetGoogle Scholar
  55. Iri, M. (1979 a): Survey of recent trends in applications of matroids. Proceedings of the 1979 International Symposium on Circuits and Systems, Tokyo, p. 987.Google Scholar
  56. Iri, M. (1979 b): A review of recent work in Japan on principal partitions of matroids and their applications. Annals of the New York Academy of Sciences, Vol. 319 (Proceedings of the Second International Conference on Combinatorial Mathematics, 1978 ), pp. 306 - 319.Google Scholar
  57. Iri, M. (1981a): “Dualities” in graph theory and in the related fields viewed from the metatheoretical standpoint. In Graph Theory and Algorithms (Saito, N., and Nishizeki, T., eds.). Lecture Note in Computer Science 108, Springer-Verlag, pp. 124–136.Google Scholar
  58. Iri, M. (1981b): Application of matroid theory to engineering systems problems. Proceedings of the Sixth Conference on Probability Theory (September, 1979; Bereanu, B., et al., eds.), Editura Academiei Republicii Socialiste Romania, pp. 107–127.Google Scholar
  59. Iri, M. (1982): Structural theory for the combinatorial systems characterized by sub-modular functions. Silver-Jubilee Conference on Combinatorics, The University of Waterloo, June.Google Scholar
  60. Iri, M., and Fujishige, S. (1981): Use of matroid theory in operations research, circuits and systems theory. International Journal of Systems Science, Vol. 12, pp. 27–54.MathSciNetMATHCrossRefGoogle Scholar
  61. Iri, M., and Han, T.-S. (1977): Linear Algebra - Standard Forms of Matrices (in Japanese). Kyoiku-Shuppan Co., Tokyo.Google Scholar
  62. Iri, M., and Recski, A. (1979): Reflection on the concepts of dual, inverse and adjoint networks (in Japanese). Papers of the Technical Group on Circuits and Systems, Institute of Electronics and Communication Engineers of Japan, CAS 79-78 (English translation available).Google Scholar
  63. Iri, M., and Recski, A. (1980 a): Reflection on the concepts of dual, inverse and adjoint networks, II - Towards a qualitative theory (in Japanese). Papers of the Technical Group on Circuits and Systems, Institute of Electronics and Communication Engineers of Japan, CAS 79-133 (English translation available).Google Scholar
  64. Iri, M., and Recski, A. (1980b): What does duality really mean? Circuit Theory and Applications, Vol. 8, pp. 317–324.MathSciNetMATHCrossRefGoogle Scholar
  65. Iri, M., and Tomizawa, N. (1974 a): A practical criterion for the existence of the unique solution in a linear electric network with mutual couplings (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 57 A, pp. 599–605.Google Scholar
  66. Iri, M., and Tomizawa, N. (1974b): An algorithms for solving the ‘independent assignment problem’ with application to the problem of determining the order of complexity of a network (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 57 A, pp. 627–629.Google Scholar
  67. Iri, M., and Tomizawa, N. (1975 a): A unifying approach to fundamental problems in network theory by means of matroids (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 58 A, pp. 33–40.Google Scholar
  68. Iri, M., and Tomizawa, N. (1975 b): An algorithm for finding an optimal “independent assignment”. Journal of the Operations Research Society of Japan, Vol. 19, pp. 32–57.Google Scholar
  69. Iri, M., Tomizawa, N., and Fujishige, S. (1977): On the controllability and observability of a linear system with combinatorial constraints (in Japanese). Transactions of the Society of Instrument and Control Engineers, Japan, Vol. 13, pp. 225–242.Google Scholar
  70. Iri, M., Tsunekawa, J., and Murota, K. (1982): Graph-theoretic approach to large-scale systems - Structural solvability and block-triangularization (in Japanese). Transactions of Information Processing Society of Japan, Vol. 23, pp. 88–95.Google Scholar
  71. Iri, M., Tsunekawa, J., and Yajima, K. (1971): The graphical techniques used for a chemical process simulator “JUSE GIFS”. Information Processing 71 (Proceedings of the 1971 IFIP Congress), Vol. 2 (Applications), pp. 1150–1155.Google Scholar
  72. Jensen, P. M., and Korte, B. (1982): Complexity of matroid property algorithms. SIAM Journal on Computing, Vol. 11, pp. 184–190.MathSciNetMATHCrossRefGoogle Scholar
  73. Kel’mans, A. K., Lomonosov, N. V., and Polesskii, V. P. (1976): Minimum matroid coverings (in Russian). Problemy Peredachi Informatsii, Vol. 12, pp. 94–107.MathSciNetMATHGoogle Scholar
  74. Kishi, G., and Kajitani, Y. (1968): Maximally distinct trees in a linear graph (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 51 A, pp. 196–203.Google Scholar
  75. Knuth, D. E. (1973): Matroid partitioning. Report Stan-CS-73-342, Stanford University.Google Scholar
  76. Korte, B., and Hausmann, D. (1978): An analysis of the greedy heuristic for independence systems. Annals of Discrete Mathematics, Vol. 2, pp. 65–74.MathSciNetMATHCrossRefGoogle Scholar
  77. Kron, G. (1939): Tensor Analysis of Networks. John Wiley and Sons, New York.Google Scholar
  78. Kron, G. (1963): Diakoptics - The Piecewise Solution of Large-Scale Systems. Mac- donald, London.Google Scholar
  79. Kuh, E. S., Layton, D., and Tow, J. (1968): Network analysis via state variables. In Network and Switching Theory ( Biorci, G., ed.), Academic Press, New York.Google Scholar
  80. Kuh, E. S., and Rohrer, R. A. (1965): The state variable approach to network analysis. Proceedings of the IEEE, Vol. 53, pp. 672–686.CrossRefGoogle Scholar
  81. Kung, J. P. S. (1978): Bimatroids and invariants. Advances in Mathematics, Vol. 30, pp. 238–249.MathSciNetMATHCrossRefGoogle Scholar
  82. Laman, G. (1970): On graphs and rigidity of plane skeletal structures. Journal of Engineering Mathematics, Vol. 4, pp. 331–340.MathSciNetMATHCrossRefGoogle Scholar
  83. Lawler, E. L. (1975): Matroid intersection algorithms. Mathematical Programming, Vol. 9, pp. 31–56.MathSciNetMATHCrossRefGoogle Scholar
  84. Lawler, E. L. (1976): Combinatorial Optimization: Networks and Matroids. Holt, Rinehart and Winston, New York.Google Scholar
  85. Lehman, A. (1964): A solution to the Shannon switching game. Journal of the Society of the Industrial and Applied Mathematics, Vol. 12, pp. 687–725.MathSciNetMATHCrossRefGoogle Scholar
  86. Lovász, L. (1977): Flats in matroids and geometric graphs. In Combinatorial Surveys (Cameron, P., ed.), (Proceedings of the 6th British Combinatorial Conference), Academic Press, pp. 45–86.Google Scholar
  87. Lovász, L. (1980): Matroid matching and some applications. Journal of Combinatorial Theory, Series B, Vol. 28, pp. 208–236.MATHGoogle Scholar
  88. Lovász, L. (1981): The matroid matching problem. In Algebraic Methods in Graph Theory (Lovász, L., and Sós, V. T., eds.), Colloquia Mathematica Societatis Jänos Bolyai 25, North-Holland, pp. 495–517.Google Scholar
  89. Lovász, L., and Yemini, Y. (1982): On generic rigidity in the plane. SIAM Journal on Algebraic and Discrete Methods, Vol. 3, pp. 91–98.MATHCrossRefGoogle Scholar
  90. Manabe, R., and Kotani, S. (1973): On the minimal spanning arborescence of a direct graph (in Japanese). Keiei-Kagaku (Official Journal of the Operations Research Society of Japan), Vol. 17, pp. 269–278.MathSciNetGoogle Scholar
  91. Maurer, S. B. (1975): A maximum-rank minimum-term-rank theorem for matroids. Linear Algebra and Its Applications, Vol. 10, pp. 129–237.MathSciNetMATHCrossRefGoogle Scholar
  92. Meetz, K., and Engl, W. L. (1980): Electromagnetische Felder. Springer-Verlag, Berlin.Google Scholar
  93. Megiddo, N. (1974): Optimal flows in networks with multiple sources and sinks. Mathematical Programming, Vol. 7, pp. 97–107.MathSciNetMATHCrossRefGoogle Scholar
  94. McDiarmid, C. J. H. (1975): Rado’s theorem for polymatroids. Mathematical Proceedings of the Cambridge Philosophical Society, Vol. 78, pp. 263–281.MathSciNetMATHCrossRefGoogle Scholar
  95. Milic, M. (1974): General passive networks: solvability, degeneracies and order of complexity. IEEE Transactions on Circuits and Systems, Vol. CAS-21, pp. 173–183.Google Scholar
  96. Minty, G. J. (1966): On the axiomatic foundations of the theories of directed linear graphs, electrical networks and network programming. Journal of Mathematics and Mechanics, Vol. 15, pp. 485–520.MathSciNetMATHGoogle Scholar
  97. Mizoo, Y., Iri, M., and Kondo, K. (1958): On the torsion and linkage characteristics and the duality of electric, magnetic and dielectric networks. RAAG Memoirs, Vol. 2, A- VIII, pp. 84–117.Google Scholar
  98. Murota, K. (1982): Menger-decomposition of a graph and its application to the structural analysis of a large-scale system of equations. Kokyuroku 453, Research Institute of Mathematical Sciences, Kyoto University, pp. 127–173.Google Scholar
  99. Murota, K., and Iri, M. (1982): Matroidal approach to the structural solvability of a system of equations. XIth International Symposium on Mathematical Programming, Universität Bonn.Google Scholar
  100. Nakamura, M. (1982 a): Boolean sublattices connected with minimization problems on matroids. Mathematical Programming, Vol. 22, pp. 117–120.Google Scholar
  101. Nakamura, M. ( 1982 b): Mathematical Analysis of Discrete Systems and Its Applications (in Japanese). Doctor’s dissertation, Faculty of Engineering, University of Tokyo.Google Scholar
  102. Nakamura, M., and Iri, M. (1979): Fine structures of matroid intersections and their applications. Proceedings of the International Symposium on Circuits and Systems, Tokyo, pp. 996–999.Google Scholar
  103. Nakamura, M., and Iri, M. ( 1980 a): On the decomposition of a directed graph with respect to arborescences and related problems. Kokyuroku 396 (Symposium on Graphs and Combinatorics III), Research Institute of Mathematical Sciences, Kyoto University, pp. 104–118.Google Scholar
  104. Nakamura, M., and Iri, M. (1980 b): Polylinking systems and their principal partition (in Japanese). Proceedings of the 1980 Spring Conference of the Operations Research Society of Japan, B-6, pp. 56–57.Google Scholar
  105. Nakamura, M., and Iri, M. (1981): A structural theory for submodular functions, polymatroids and polymatroid intersections. Research Memorandum RMI 81 - 06, Department of Mathematical Engineering and Instrumentation Physics, University of Tokyo.Google Scholar
  106. Narayanan, H. (1974): Theory of Matroids and Network Analysis. Ph. D. Thesis, Department of Electrical Engineering, Indian Institute of Technology, 117, Bombay.Google Scholar
  107. Narayanan, H., and Vartak, M. N. (1981): An elementary approach to the principal partition of a matroid. Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. E 64, pp. 227–234.Google Scholar
  108. Numata, J., and Iri, M. (1973): Mixed-type topological formulas for general linear networks. IEEE Transactions on Circuit Theory, Vol. CT-20, pp. 488–494.Google Scholar
  109. Ohtsuki, T., Ishizaki, and Watanabe, H. (1968): Network analysis and topological degrees of freedom (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 51 A, pp. 238 - 245.Google Scholar
  110. Oono, Y. (1960): Formal readability of linear networks. Proceedings of the Symposium on Active Networks and Feedback Systems, Polytechnic Institute of Brooklyn, New York, pp. 475–586.Google Scholar
  111. Ozawa, T. (1972): Order of complexity of linear active networks and common tree in the 2-graph method, Electronics Letters, Vol. 8, pp. 542–543.MathSciNetCrossRefGoogle Scholar
  112. Ozawa, T. (1974): Common trees and partition of two-graphs (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 57 A, pp. 383–390.Google Scholar
  113. Ozawa, T. (1976 a): Topological conditions for the solvability of linear active networks. Circuit Theory and Applications, Vol. 4, pp. 125–136.Google Scholar
  114. Ozawa, T. (1976 b): Structure of 2-graphs (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. J 59 A, pp. 262–263.Google Scholar
  115. Ozawa, T., and Kajitani, Y. (1979): Diagnosability of linear active networks. Proceedings of the International Symposium on Circuits and Systems, Tokyo, pp. 866–869.Google Scholar
  116. Petersen, B. (1978): Investigating solvability and complexity of linear active networks. Proceedings of the 1978 European Conference on Circuit Theory and Design, Lausanne.Google Scholar
  117. Petersen, B. (1979 a): Investigating solvability and complexity of linear active networks by means of matroids. IEEE Transactions on Circuits and Systems. Vol. CAS-26, No. 5, pp. 330–342.Google Scholar
  118. Petersen, B. ( 1979 b): The qualitative appearance of linear active network transfer functions by means of matroids. Proceedings of the International Symposium on Circuits and Systems, Tokyo, pp. 992–995.Google Scholar
  119. Tomizawa, N. (1976): Strongly irreducible matroids and principal partitions of a matroid into strongly irreducible minors (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. J 59 A, pp. 83–91.Google Scholar
  120. Tomizawa, N., and Fujishige, S. (1982): Historical survey of extensions of the concept of principal partition and their unifying generalization to hypermatroids. Systems Science Research Report, No. 5, Department of Systems Science, Graduate School of Science and Engineering, Tokyo Institute of Technology.Google Scholar
  121. Tomizawa, N., and Iri, M. (1974): An algorithm for determining the rank of a triple matrix product A XB with application to the problems of discerning the existence of the unique solution in a network (in Japanese). Transactions of the Institute of Electronics and Communication Engineers of Japan, Vol. 57 A, pp. 834–841.Google Scholar
  122. Tomizawa, N., and Iri, M. (1976): Matroids (in Japanese). Journal of the Institute of Electronics and Communication Engineers of Japan, Vol. 59, pp. 1350 - 1352.Google Scholar
  123. Tomizawa, N., and Iri, M. (1977): On matroids (in Japanese). Journal of the Society of Instrument and Control Engineers, Japan, Vol. 16, pp. 455–468.Google Scholar
  124. Weinberg, L. (1962): Network Analysis and Synthesis. McGraw-Hill.Google Scholar
  125. Weinberg, L. (1977): Matroids, generalized networks, and electric network synthesis. Journal of Combinatorial Theory, Series B, Vol. 23, pp. 106–126.MathSciNetMATHGoogle Scholar
  126. Welsh, D. J. A. (1968): Kruskal’s theorem for matroids. Mathematical Proceedings of the Cambridge Philosophical Society, Vol. 64, pp. 3 - 4.MathSciNetMATHCrossRefGoogle Scholar
  127. Welsh, D. J. A. (1970): On matroid theorems of Edmonds and Rado. Journal of the London Mathematical Society, Vol. 2, pp. 251–256.MathSciNetMATHCrossRefGoogle Scholar
  128. Welsh, D. J. A. (1976): Matroid Theory. Academic Press, London.MATHGoogle Scholar
  129. Whitney, H. (1935): On the abstract properties of linear dependence. American Journal of Mathematics, Vol. 57, pp. 509–533.MathSciNetCrossRefGoogle Scholar
  130. Wilson, R. J. (1973): An introduction to matroid theory. American Mathematical Monthly, Vol. 80, pp. 500–525.MathSciNetMATHCrossRefGoogle Scholar
  131. Yajima, K., Tsunekawa, J., and Kobayashi, S. (1981): On equation-based dynamic simulation. Proceedings of the 2 nd World Congress of Chemical Engineering, Vol. V, pp. 469–480.Google Scholar
  132. Yao, A. C.C. (1975): An O(|E|log log|V|) algorithm for finding minimum spanning trees. Information Processing Letters, Vol. 4, pp. 21 - 25.MATHCrossRefGoogle Scholar
  133. Zimmermann, U. (1981a): Minimization of some nonlinear functions over polymatroidal flows. Report 81 - 5, Mathematisches Institut, Universität zu Köln.Google Scholar
  134. Zimmermann, U. (1981b): Minimization on submodular flows. Discrete Applied Mathematics, Vol. 4, pp. 303–323.SGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1983

Authors and Affiliations

  • M. Iri
    • 1
  1. 1.Faculty of Engineering, Dept. of Mathematical EngineeringUniversity of TokyoBunkyo-ku, TokyoJapan

Personalised recommendations