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A characterization of complete metric spaces. (English) Zbl 0468.54021


MSC:

54E50 Complete metric spaces
54C30 Real-valued functions in general topology
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References:

[1] H. Brézis and F. E. Browder, A general principle on ordered sets in nonlinear functional analysis, Advances in Math. 21 (1976), no. 3, 355 – 364. · Zbl 0339.47030
[2] James Caristi, Fixed point theorems for mappings satisfying inwardness conditions, Trans. Amer. Math. Soc. 215 (1976), 241 – 251. · Zbl 0305.47029
[3] I. Ekeland, On the variational principle, J. Math. Anal. Appl. 47 (1974), 324 – 353. · Zbl 0286.49015
[4] Ivar Ekeland, Nonconvex minimization problems, Bull. Amer. Math. Soc. (N.S.) 1 (1979), no. 3, 443 – 474. · Zbl 0441.49011
[5] W. A. Kirk, Caristi’s fixed point theorem and the theory of normal solvability, Fixed point theory and its applications (Proc. Sem., Dalhousie Univ., Halifax, N.S., 1975) Academic Press, New York, 1976, pp. 109 – 120.
[6] W. A. Kirk, Caristi’s fixed point theorem and metric convexity, Colloq. Math. 36 (1976), no. 1, 81 – 86. · Zbl 0353.53041
[7] R. R. Phelps, Support cones in Banach spaces and their applications, Advances in Math. 13 (1974), 1 – 19. · Zbl 0284.46015
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