Hostname: page-component-848d4c4894-4rdrl Total loading time: 0 Render date: 2024-06-14T21:22:54.806Z Has data issue: false hasContentIssue false

New generalisations of an H-KKM type theorem and their applications

Published online by Cambridge University Press:  17 April 2009

Xie Ping Ding
Affiliation:
Department of Mathematics Sichuan Normal, University Chengdu, Sichuan 610066, Peoples Republic of China
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this note, we establish some new generalisations of an H-KKM type theorem which unify and generalise the corresponding results of Horvath, Bardaro-Ceppitelli, Tarafdar, Shioji, Park and others. As applications of our H-KKM type principle, we obtain some new generalisations of the Ky Fan type geometric properties of. H-spaces, minimax inequalities and coincidence theorems in Horvath's abstract setting.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1993

References

[1]Aubin, J.P. and Ekeland, I., Applied nonlinear analysis (John Wiley and Sons, New York, 1984).Google Scholar
[2]Bardaro, C. and Ceppitelli, R., ‘Some further generalizations of Knaster-Kuratowski-Mazurkiewicz theorem and minimax inequalities’, J. Math. Anal. Appl. 132 (1988), 484490.CrossRefGoogle Scholar
[3]Bardaro, C. and Ceppitelli, R., ‘Applications of the generalized Knaster-Kuratowski-Mazurkiewicz theorem to variational inequalities’, J. Math. Anal. Appl. 137 (1989), 4658.CrossRefGoogle Scholar
[4]Ben-El-Mechaiekh, H., Deguire, P. and Granas, A., ‘Une alternative non linéaire en analyse convexe et applications’, C.R. Acad. Sci. Paris 295 (1982), 257259.Google Scholar
[5]Ben-El-Mechaiekh, H., Deguire, P. and Granas, A., ‘Points fixes et coincidences pour les applications multivoque’, C.R. Acad. Sci. Paris 295 (1982), I, 337–340; II, 381384.Google Scholar
[6]Browder, F.E., ‘The fixed point theory of multi-valued mappings in topological vector spaces’, Math. Ann. 177 (1968), 283301.CrossRefGoogle Scholar
[7]Browder, F.E., ‘On a sharpened form of the Schauder fixed-point theorem theorem’, Proc.Nat. Acad. Sci. U.S.A. 74 (1977), 47494751.CrossRefGoogle ScholarPubMed
[8]Browder, F.E., ‘Coincidence theorems, minimax theorems, and variational inequalities’, Contemp. Math. 26 (1984), 6780.CrossRefGoogle Scholar
[9]Chang, S.Y., ‘A generalization of KKM principle and its applications’, Soochow J. Math. 15 (1989), 717.Google Scholar
[10]Chang, S.S. and Ma, Y.H., ‘Generalized KKM theorem on H-space with applications’, J. Math. Anal. Appl. 163 (1992), 406421.CrossRefGoogle Scholar
[11]Ding, X.P., ‘Coincidence theorems in H-spaces and its applications’, J. Sichuan Normal Univ. 14 (1991), 2732.Google Scholar
[12]Ding, X.P., ‘Existence theorem of maximizable. H-quasiconcave funcations’, Acta Math. Sinica 36 (1993), 273279.Google Scholar
[13]Ding, X.P. and Tan, K.K., ‘Matching theorems, fixed point theorems and minimax inequalities without convexity’, J. Austral. Math. Soc. Ser. A 49 (1990), 111128.CrossRefGoogle Scholar
[14]Fan, Ky, ‘A generalization of Tychonoff's fixed point theorem’, Math. Ann. 142 (1961), 305310.CrossRefGoogle Scholar
[15]Fan, Ky, ‘A minimax inequality and applications’, in Inequalities III, (Shisha, O., Editor) (Academic Press, New York, 1972), pp. 103113.Google Scholar
[16]Fan, Ky, ‘Fixed-point and related theorems for noncompact convex sets’, in Game theory and related topics, (Moeshlin, O. and Pallaschke, D., Editors) (North-Holland, Amsterdam, 1979), pp. 151156.Google Scholar
[17]Fan, Ky, ‘Some properties of convex sets related fixed point theorems’, Math. Ann. 266 (1984), 519537.CrossRefGoogle Scholar
[18]Ha, C.W., ‘Minimax and fixed point theorems’, Math. Ann. 248 (1980), 7377.CrossRefGoogle Scholar
[19]Ha, C.W., ‘On a minimax inequality of Ky Fan’, Proc. Amer. Math. Soc. 99 (1987), 680682.CrossRefGoogle Scholar
[20]Horvath, C., ‘Some results on multivalued mappings and inequalities without convexity’, in Nonlinear and convex analysis, (Lin, B.L. and Simons, S., Editors) (Dekker, New York, 1987), pp. 99106.Google Scholar
[21]Horvath, C., ‘Contractibility and generalized convexity’, J. Math. Anal. Appl. 156 (1991), 341357.CrossRefGoogle Scholar
[22]Jiang, J., ‘Fixed point theorems for paracompact convex sets’, Acta Math. Sinica 4 (1988), I, 64–71; II, 234241.Google Scholar
[23]Jiang, J., ‘Fixed point theorems for convex set’, Acta Math. Sinica 4 (1988), 356363.Google Scholar
[24]Jiang, J., ‘Coincidence theorems and minimax theorems’, Acta Math. Sinica 5 (1989), 307320.Google Scholar
[25]Klein, E. and Thompson, A.C., Theory of correspondence (John Wiley and Sons, New York, 1984).Google Scholar
[26]Ko, H.M. and Tan, K.K., ‘A coincidence theorem with applications to minimax inequalities and fixed point theorems’, Tamkang J. Math. 17 (1986), 3745.Google Scholar
[27]Komiya, H., ‘Coincidence theorems and saddle point theorem’, Proc. Amer. Math. Soc. 96 (1986), 599602.CrossRefGoogle Scholar
[28]Lassonde, M., ‘On the use of KKM multifunctions in fixed point theory and related topics’, J. Math. Anal. Appl. 97 (1983), 151201.CrossRefGoogle Scholar
[29]McLinden, L., ‘Acyclic multifunctions without metrizability’, in Résumés des Collogue International: Théorie du Point Fixe et Applications (Marseille-Luminy, 1989), pp. 150151.Google Scholar
[30]Mehta, G., ‘Fixed points equilibria and maximal elements in linear topological spaces’, Comment. Math. Univ. Carolin. 28 (1987), 377385.Google Scholar
[31]Mehta, G. and Tarafdar, E., ‘Infinite-dimensional Gale-Nikaido-Debreu theorem and a fixed point theorem of Tarafdar’, J. Econom. Theory. 41 (1987), 333339.CrossRefGoogle Scholar
[32]Park, S., ‘Generalizations of Ky Fan's matching theorems and their applications’, J. Math. Anal. Appl. 141 (1989), 164176.CrossRefGoogle Scholar
[33]Park, S., ‘Generalizations of Ky Fan's matching theorems and their applications II’, J. Korean Math. Soc. 28 (1991), 275283.Google Scholar
[34]Park, S., ‘Some coincidence theorems on acyclic multifunctions and applications to KKM theory’, in Fixed point theory and applications, (Tan, K.K., Editor) (World Sci. Pub. Co. Pte. Ltd., Singapore, 1992), pp. 248277.Google Scholar
[35]Sessa, S., ‘Some remarks and applications of an extension of a lemma of Ky Fan’, Comment. Math. Univ. Carolin. 29 (1988), 567575.Google Scholar
[36]Shioji, N., ‘A further generalization of the Knaster-Kuratowski-Mazurkiewicz theorem’, Proc. Amer. Math. Soc. 111 (1991), 187195.CrossRefGoogle Scholar
[37]Simons, S., ‘Two-function minimax theorems and variational inequalities for functions on compact and noncompact sets, with some comments on fixed-point theorems’, Proc. Sympos. Pure Math. 45 (1986), 377392.CrossRefGoogle Scholar
[38]Takahashi, W., ‘Fixed point, minimax, and Hahn-Banach theorems’, Proc. Sympos. Pure Math. 45 (1986), 419427.CrossRefGoogle Scholar
[39]Tarafdar, E., ‘On nonlinear variational inequalities’, Proc. Amer. Math. Soc. 67 (1977), 9598.CrossRefGoogle Scholar
[40]Tarafdar, E., ‘On minimax principle and sets with convex sections’, Publ. Math. Debrecen 29 (1982), 219226.CrossRefGoogle Scholar
[41]Tarafdar, E., ‘Variational problems via a fixed point theorem’, Indian J. Math. 28 (1986), 229240.Google Scholar
[42]Tarafdar, E., ‘A fixed point theorem equivalent to the Fan-Knaster-Kuratowski-Mazurkiewicz theorem’, J. Math. Anal. Appl. 63 (1987), 475–470.CrossRefGoogle Scholar
[43]Tarafdar, E., ‘A fixed point theorem in H-space and related results’, Bull. Austral. Math. Soc. 42.(1990), 133140.CrossRefGoogle Scholar
[44]Tarafdar, E. and Husain, T., ‘Duality in fixed point theory of multi-valued mappings with applications’, J. Math. Anal. Appl. 63 (1978), 371376.CrossRefGoogle Scholar
[45]Yannelis, N. and Prabhakar, N.D., ‘Existence of maximal elements and equilibria in linear topological spaces’, J. Math. Econom. 12 (1983), 233245.CrossRefGoogle Scholar