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A unique fixed point theorem in metric spaces. (English) Zbl 0858.54040

Summary: Results of M. Edelstein [J. Lond. Math. Soc. 37, 74-79 (1962; Zbl 0113.16503)], B. K. Ray [Bull. Math. Soc. Sci. Math. R.S.R., n. Ser. 16(64) (1972), 467-469 (1974; Zbl 0291.54055)], D. S. Jaggi [Indian J. Pure Appl. Math. 8, 223-230 (1977; Zbl 0379.54015)], S. Gupta and B. K. Dass [ibid. 6, 1455-1458 (1975; Zbl 0371.54074)], and of V. Popa [ibid. 14, 713-717 (1983; Zbl 0546.54035)] are extended to a more general form.

MSC:

54H25 Fixed-point and coincidence theorems (topological aspects)
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