There are many ways of measuring the distance between two closed convex cones in a normed space. This work surveys the existing methods and discusses the merit of each one.

Contact details are reproduced from the original publication and may be historical.

Alfredo Noel Iusem

Inst. Matemática Pura e Aplicada, Estrada Doña Castorina 110, Rio de Janeiro - CEP 22460-320, Brazil

iusp@impa.br
  1. N. I. Akhiezer, I. M. Glazman: Theory of Linear Operators in Hilbert Space. Vol. I, Pitman, Boston (1981).Google Scholar
  2. H. Attouch: Variational Convergence for Functions and Operators, Pitman, Boston (1984).Google Scholar
  3. J. P. Aubin, H. Frankowska: Set-Valued Analysis, Birkhäuser, Boston (1990).Google Scholar
  4. G. Beer: Topologies on Closed and Closed Convex Sets, Kluwer, Dordrecht (1993).https://doi.org/10.1007/978-94-015-8149-3Google Scholar
  5. R. Bhatia: Matrix Analysis, Springer, New York (1996).https://doi.org/10.1007/978-1-4612-0653-8Google Scholar
  6. L. Contesse, J. P. Penot: Continuity of the Fenchel correspondence and continuity of polarities, J. Math. Anal. Appl. 156 (1991) 305–328.https://doi.org/10.1016/0022-247X(91)90399-KGoogle Scholar
  7. B. Ćurgus, V. Mascioni: Perturbations of roots under linear transformations of polynomials, Constr. Approx. 25 (2007) 255–277.https://doi.org/10.1007/s00365-006-0649-0Google Scholar
  8. A. Feintuch: Robust Control Theory in Hilbert Space, Springer, New York (1998).https://doi.org/10.1007/978-1-4612-0591-3Google Scholar
  9. I. C. Gohberg, A. S. Marcus: Two theorems on the gap between subspaces of a Banach space, Usp. Mat. Nauk 14(5)(89) (1959) 135–140.Google Scholar
  10. O. Güler: Barrier functions in interior point methods, Math. Oper. Res. 21 (1996) 860–885.https://doi.org/10.1287/moor.21.4.860Google Scholar
  11. V. I. Gurariĭ: Openings and inclinations of subspaces of a Banach space, Teor. Funkts. Funkts. Anal. Prilozh. 1 (1965) 194–204.Google Scholar
  12. F. Hiai, Y. Nakamura: Distance between unitary orbits in von Neumann algebras, Pacific J. Math. 138 (1989) 259–294.https://doi.org/10.2140/pjm.1989.138.259Google Scholar
  13. L. Hörmander: Sur la fonction d’appui des ensembles convexes dans un espace localement convexe, Ark. Mat. 3 (1955) 181–186.https://doi.org/10.1007/BF02589354Google Scholar
  14. A. Iusem, A. Seeger: Axiomatization of the index of pointedness for closed convex cones, Comput. Appl. Math. 24 (2005) 245–283.https://doi.org/10.1590/S0101-82052005000200006Google Scholar
  15. A. Iusem, A. Seeger: Angular analysis of two classes of non-polyhedral convex cones: the point of view of optimization theory, Comput. Appl. Math. 26 (2007) 191–214.https://doi.org/10.1590/S0101-82052007000200002Google Scholar
  16. A. Iusem, A. Seeger: Normality and modulability indices. Part I: convex cones in normed spaces, J. Math. Anal. Appl. 338 (2008) 365–391.https://doi.org/10.1016/j.jmaa.2007.05.030Google Scholar
  17. A. Iusem, A. Seeger: Normality and modulability indices. Part II: convex cones in Hilbert spaces, J. Math. Anal. Appl. 338 (2008) 392–406.https://doi.org/10.1016/j.jmaa.2007.05.019Google Scholar
  18. W. A. Kirk, M. F. Smiley: Another characterization of inner product spaces, Amer. Math. Monthly 71 (1964) 890–891.https://doi.org/10.2307/2312400Google Scholar
  19. M. Kisielewicz: Differential Inclusions and Optimal Control, PWN, Warsaw (1991).Google Scholar
  20. M. A. Krasnoselskiĭ, M. G. Krein: Fundamental theorems on the extension of Hermitian operators and certain of their applications to the theory of orthogonal polynomials and the problem of moments, Usp. Mat. Nauk 2(3)(19) (1947) 60–106.Google Scholar
  21. M. G. Krein: Propriétés fondamentales des ensembles coniques normaux dans l’espace de Banach, C. R. (Dokl.) Acad. Sci. URSS, n. Ser. 28 (1940) 13–17.Google Scholar
  22. K. Kuratowski: Introduction to Set Theory and Topology, Addison-Wesley, Reading (1962).Google Scholar
  23. M. I. Ostrovskiĭ: Topologies on the set of all subspaces of a Banach space and related questions of Banach space geometry, Quaest. Math. 17(3) (1994) 259–319.https://doi.org/10.1080/16073606.1994.9631766Google Scholar
  24. V. I. Paraska: A remark on the distance between linear operators in the gap metric, Mat. Issled. 10(2)(36) (1975) 271–274.Google Scholar
  25. J. P. Penot, C. Zălinescu: Continuity of the Legendre-Fenchel transform for some variational convergences, Optimization 53 (2004) 549–562.https://doi.org/10.1080/02331930412331329533Google Scholar
  26. D. Pompeiu: Sur la Continuité des Fonctions des Variables Complexes, Ph.D. Thesis, Gauthier-Villars, Paris (1905); Toul. Ann. 7 (1905) 265–315.https://doi.org/10.5802/afst.226Google Scholar
  27. R. T. Rockafellar, R. J.-B. Wets: Variational Analysis, Springer, Berlin (1998).https://doi.org/10.1007/978-3-642-02431-3Google Scholar
  28. S. Shimizu: A remark on homogeneous convex domains, Nagoya Math. J. 105 (1987) 1–7.https://doi.org/10.1017/S0027763000000696Google Scholar
  29. D. W. Walkup, R. J.-B. Wets: Continuity of some convex-cone-valued mappings, Proc. Amer. Math. Soc. 18 (1967) 229–235.https://doi.org/10.1090/S0002-9939-1967-0209806-6Google Scholar
  30. A. Seeger: Stabilization of the point spectral mapping, J. Nonlinear Convex Anal. 4 (2003) 277–285.Google Scholar

A. N. Iusem, A. Seeger. “Distances between Closed Convex Cones: Old and New Results.” Journal of Convex Analysis 17 (2010), No. 3&4, 1033–1055. https://doi.org/10.68381/jca17064