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Showing papers by "Sichuan University published in 1981"


Journal ArticleDOI
Ying-ming Liu1
TL;DR: This paper shows that Hutton’s formula on the intersection operation does not hold for all completely distributive lattices, except the lattice (0, I}, and shows some properties about the intersectionoperation which will be needed in the latter work on fuzzy uniformity and fuzzy metrization.

14 citations



Journal ArticleDOI
Li Delang1
TL;DR: In this paper, it was shown that for any given positive integer N and k the number of integers n N for which the equation 4 n = 1 x + 1 y + 1 z is unsolvable in positive integers x, y, z is not greater than cN ( log N) k, where c is a constant depending only on k.

5 citations


Book ChapterDOI
Liu Ying-Ming1
TL;DR: Some simple and direct proofs of two theorems that describe the relationships between the fuzzy convex cones and the fuzzy linear subspaces and that originally appeared in [6] are given.

1 citations


Journal ArticleDOI
TL;DR: The random fixed point theorems in the abstract metric space X, which is metricized by the elements of the partially ordered set G, are studied and some fundamental properties of the abstract topological measure space X are studied.