Abstract
The generalized topological degree theory is based on the Brouwer and Leray-Schauder degrees. It can be defined for general classes of mappings. The purpose of this article is two-fold. One goal is to define the topological degree for maximal monotone operators. Particular attention is paid to the continuation methods for this kind of operators and real functions of convex type. This allows us to extend some recent results (see [5], [6]) by withdrawing the compactness assumptions.
References
- R.R. Akhmerov, M.I. Kamenskii, A.S. Potapov, A.E. Rodkina and B.N. Sadovskii: Measures of noncompactness and condensing operators, Birkhäuser-Verlag, Basel-Boston-Berlin, 1992.https://doi.org/10.1007/978-3-0348-5727-7Google Scholar
- H. Amann: A note on degree theory for gradient maps, Proc. AMS 85 (1982) 591–595.https://doi.org/10.1090/S0002-9939-1982-0660610-2Google Scholar
- H. Amann, S. Weiss: On the uniqueness of the topological degree, Math. 2, 130 (1973) 39–54.https://doi.org/10.1007/BF01178975Google Scholar
- H. Attouch: Variational convergence for functions and operators, Appl. Math. Series, Pitman, London, 1984.Google Scholar
- H. Attouch, J.-P. Penot, H. Riahi: The continuation methods and variational convergence, in: “Fixed point theory and applications”, B. Baillon, M. Théra, esd., Research Notes in Math., Pitman, London, (1991) 9–32.Google Scholar
- H. Attouch, H. Riahi: The epi-continuous method for minimization problems. Relation with the degree theory of F. Browder for maximal monotone operators, in: “Partial differential equations and the calculus of variations, Vol.1”, F. Colombini et al. eds., Birkhäuser, Boston, (1989) 29–58.https://doi.org/10.1007/978-1-4684-9196-8_3Google Scholar
- H. Attouch, R. J-B Wets: A convergence theory for saddle functions, Trans. AMS 280 (1983) 1–41.https://doi.org/10.1090/S0002-9947-1983-0712247-XGoogle Scholar
- H. Attouch, R. J-B Wets: A convergence for bivariate functions aimed at the convergence of saddle values, in: Lecture Notes Math. 979, Springer-Verlag, Berlin, (1983) 1–43.https://doi.org/10.1007/BFb0066247Google Scholar
- D. Azé: Convergences variationnelles et dualité. Applications en calcul des variations et en programmation mathématique, Thèse d’état, Université Perpignan, 1986.Google Scholar
- V. Barbu: Nonlinear semigroups and differential equations in Banach spaces, Leyden, 1976.https://doi.org/10.1007/978-94-010-1537-0Google Scholar
- J. Berkovits, V. Mustonen: On the topological degree for mappings of monotone type, Nonlinear Analysis, Theory, Methods and Applications 10 (1986) 1373–1383.https://doi.org/10.1016/0362-546X(86)90108-2Google Scholar
- J. Berkovits, V. Mustonen: An extension of the Leray-Schauder degree and applications to nonlinear wave equations, Differential and Integral Equations 3 (1990) 945–963.https://doi.org/10.57262/die/1378730136Google Scholar
- J. Berkovits, V. Mustonen: Topological degree for perturbations of linear maximal monotone mappings and applications to a class of parabolic problems, Rendiconti di Matematica, Serie VII, Vol.112 (1992) 597–621.Google Scholar
- Y.O. Borisovich, B.D. Gel’man, A.D. Myshkis, V.V. Obukhovskii: Topological methods in the fixed-point theory of multivalued maps, Uspekhi Math. Nauk 35 (1980) 59–126.https://doi.org/10.1070/RM1980v035n01ABEH001548Google Scholar
- F.E. Browder: Nonlinear operators and nonlinear equations of evolution in Banach spaces, Proc. Symp. Pura Math., 18, 2, AMS Providence, 1976.https://doi.org/10.1090/pspum/018.2Google Scholar
- F.E. Browder: Fixed point theory and nonlinear problems, Bull. AMS 9, 1 (1983) 1–41.https://doi.org/10.1090/S0273-0979-1983-15153-4Google Scholar
- F.E. Browder: Degree of mapping for nonlinear mappings of monotone type; strongly nonlinear mappings, Proc. Nat. Acad. Sci. USA 89 (1983) 2408–2409.https://doi.org/10.1073/pnas.80.8.2408Google Scholar
- F.E. Browder: Lunicité du degré topologique pour les applications de type monotone, C.R. Acad. Sci. Paris 296 (1983) 145–148.Google Scholar
- F.E. Browder: Topological degree for pseudo-monotone operators, Conférence Collège de France, Séminaire H. Brézis and J-L. Lions, 1983.Google Scholar
- F.E. Browder: Degree theory for nonlinear mappings, Proc. Sympos. Pure Math., Vol. 45, Part I, AMS, Providence (1986) 203–226.https://doi.org/10.1090/pspum/045.1/843560Google Scholar
- F.E. Browder: Strong nonlinear parabolic equations of higher order, Atti Acc. Lincei 77 (1986) 159–172.Google Scholar
- F.E. Browder, R.D. Nussbaum: The topological degree for noncompact nonlinear mappings in Banach spaces, Bull. AMS 74 (1968) 671–676.https://doi.org/10.1090/S0002-9904-1968-11988-3Google Scholar
- F.E. Browder, W.V. Petryshyn: Approximation methods and the generalized topological degree for nonlinear maps in Banach spaces, J. Funct. Anal. 3 (1969) 217–245.https://doi.org/10.1016/0022-1236(69)90041-XGoogle Scholar
- A. Cellina, A. Lasota: A new approach to the definition of topological degree for multi valued mappings, Atti. Accad. Naz. Lincei Rend. 47 (1969) 434–440.Google Scholar
- J. Cronin: Fixed points and topological degree in nonlinear analysis, AMS, 1964.Google Scholar
- F.S. De Blasi, J. Myjak: A remark on the definition of topological degree for set-valued mappings, J. Math. Anal. Appl. 92 (1983) 445–451.https://doi.org/10.1016/0022-247X(83)90261-5Google Scholar
- K. Deimling: Nonlinear functional analysis, Springer-Verlag, Berlin, 1985.https://doi.org/10.1007/978-3-662-00547-7Google Scholar
- J. Diestel: Geometry of Banach spaces, Selected Topics, Lect. Notes Math. 485, Springer-Verlag, New-York, 1975.https://doi.org/10.1007/BFb0082079Google Scholar
- P.M. Fitzpatrick: A generalized degree for uniform limit of A-proper mappings, J. Math. Anal. Appl. 35 (1971) 536–552https://doi.org/10.1016/0022-247X(71)90201-0Google Scholar
- J.-P. Gossez: On the subdifferential of saddle functions, J. Funct. Anal. 11 (1972) 220–230.https://doi.org/10.1016/0022-1236(72)90092-4Google Scholar
- A. Granas: Sur la notion du degré topologique pour une classe de transformations multivalentes dans les espace de Banach, Bull. Polon. Sci. 7 (1959) 191–194.Google Scholar
- M. Hukuhara: Sur l’application semi-continue dont la valeur est un compact convexe, Funkcial. Ekvac 10 (1971) 43–66.Google Scholar
- M.A. Krasnoselskii, P.P. Zabreiko: Geometrical methods of nonlinear analysis: Springer-Verlag, Berlin-New York, 1980 (Russian).Google Scholar
- E. Krauss: A degree for operators of monotone type, Math. Nachrichten 114 (1983) 53–62.https://doi.org/10.1002/mana.19831140104Google Scholar
- W. Kryszewski: Topological and approximation methods in the degree theory of set valued mappings, (in Polish), University of Lodz (1988) 1–211.Google Scholar
- W. Kryszewski: Homotopy invariants for set-valued maps homotopy-approximation approach, in: “Fixed points theory and applications”, B. Baillon, M. Théra, eds., Research Notes in Math., Pitman (1991) 269–284.Google Scholar
- J.M. Lasry, R. Robert: Degré pour les fonctions multivoques et applications, C. R. Acad. Sci. Paris, Séries A-B 280 (1975) 1435–1438.Google Scholar
- J.M. Lasry, R. Robert: Degré et théorème du point fixe pour les applications multivoques et applications, Cahier Math. de Décision, Paris 6, 1975.Google Scholar
- J. Leray, J. Schauder: Topologie et équations fonctionnelles, Ann. Sci. Ecole Norm. Sup. 51 (1934) 45–78.https://doi.org/10.24033/asens.836Google Scholar
- N.G. Lloyd: Degree theory, Cambridge University Press, London, 1978.Google Scholar
- T.W. Ma: Topological degree for set-valued compact vector fields in locally convex spaces, Dissertations Math. Rozprawy Mat. 92 (1972) 1–43.Google Scholar
- J. Mawhin: Topological degree methods in nonlinear boundary value problems, CMBS Lect. Notes Math. 40, AMS, 1977.https://doi.org/10.1016/B978-0-12-164901-2.50012-XGoogle Scholar
- R.D. Nussbaum: Degree theory for local condensing maps, J. Math. Anal. Appl. 37 (1972) 741–766.https://doi.org/10.1016/0022-247X(72)90253-3Google Scholar
- W.V. Petryshyn, P.M. Fitzpatrick: A degree theory. Fixed point theorems and mapping theorems for multivalued noncompact mappings, Trans. AMS 194 (1974) 1–25.https://doi.org/10.1090/S0002-9947-1974-2478129-5Google Scholar
- H. Riahi: Degré topologique pour les fonctions convexes réelles, Extracta Mathematica, 1993.Google Scholar
- R.T. Rockafellar: Monotone operators associated with saddle functions and minimax problem, in: Nonlinear Func. Anal., I, F.E. Browder ed., Proc. Pure Math. 18 (1970) 241–250.https://doi.org/10.1090/pspum/018.1/0285942Google Scholar
- B.N. Sadovskii: Ultimately compact and condensing operators, Uspekhi Mat. Nauk 27 (1972) 81–146.https://doi.org/10.1070/RM1972v027n01ABEH001364Google Scholar
- H.W. Siegberg: Some historical remarks concerning degree theory, Amer. Math. Monthly 88 (1981) 125–139.https://doi.org/10.1080/00029890.1981.11995203Google Scholar
- S. Troyanski: On locally uniformly convex and differentiable norms in certain non-separable Banach spaces, Studia Math. 37 (1971) 173–180.https://doi.org/10.4064/sm-37-2-173-180Google Scholar
- J.R.L. Webb: On degree theory for multivalued mappings and applications, Boll. Un. Mat. Ital. 9 (1974) 137–158.Google Scholar
- S. F. Wong: The topological degree for A-proper maps, Canad. J. Math. 23 (1971) 403–412.https://doi.org/10.4153/CJM-1971-042-5Google Scholar
- E. Zeidler: Nonlinear functional analysis and its applications, II A-B, Springer-Verlag, New York, 1990.https://doi.org/10.1007/978-1-4612-0985-0Google Scholar
Suggested citation
Published by Heldermann Verlag, 1994. Rights now held by Banach Press LLC.
