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2009年06月16日

【期刊论文】Characterizations of Minimal T 3 1/2 L-Topological Spaces

李生刚, SHENG-GANG LI

Computers and Mathematies with Appications 47(2004)1739-1743,-0001,():

-1年11月30日

摘要

For L a closed sets lattice, we prove the existence and a characterization theorem of the minimal elements of T 3LX, where T 3

Fuzzy topology,, Closed sets L-topology,, T3

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2009年06月16日

【期刊论文】Local connectedness in L-topological spaces

李生刚, Sheng-Gang Li∗

Fuzzy Sets and Systems 133(2003)363-373,-0001,():

-1年11月30日

摘要

This paper studies local strong F1 connectedness and local Q-connectedness of L-topological spaces. It is shown that every L-interval J (L) and its weak induci.cation J(L) are both local strong F1 connected andlocal Q-connected, and that the local Q-connectedness of an L-topological space is equivalent to that of its induced I (L)-topological space.

L-topological space, Local strong F1 connectedness, Local Q-connectedness, L-interval, Induced I (, L), -topological space

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2009年06月16日

【期刊论文】Connectedness in L-fuzzy topological spaces

李生刚, Sheng-Gang Li

Fuzzy Sets and Systems 116(2000)361-368,-0001,():

-1年11月30日

摘要

Based on the consideration to the layer structures of fuzzy lattices and the level topologies of L-fuzzy topological spaces, a connectedness is dened for an arbitrary L-fuzzy set in this paper. This denition reects the degree of connectivity of an L-fuzzy set. It is shown that the connectedness of L-fuzzy topological spaces is an L-good extension, multiplicative and preserved under continuous L-valued Zadeh functions, and that the inverse limit of continuums is a continuum. General L-fuzzy intervals and H-intervals are dened and connectedness of them are proved. It is also shown that the connectedness of an L-fuzzy topological space is equivalent to the connectedness of its induced I (L)-fuzzy topological space.

Fuzzy topology, Connectedness, Inverse limit, L-fuzzy continuum, L-fuzzy interval, H-interval, Induced I (, L), -fuzzy topological space

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2009年06月16日

【期刊论文】Separation axioms in L-fuzzy topological spaces (I): T0 and T1

李生刚, Sheng-Gang Li

Fuzzy Sets and Systems 116(2000)377-383,-0001,():

-1年11月30日

摘要

Using the notion of remote neighborhood, we dene the separation axioms T0 and T1 in L-fuzzy topological spaces (L-fts). The relations between our denitions, Hutton and Reilly's, and Wang's are discussed, and the separations of Hutton's fuzzy unit interval and Gantner's fuzzy real line are examined. Characterizations of these L-fts are proved and a series of properties of them are investigated. Moreover, some results on minimal T0 L-fts and T1 L-fts are established, which will be used immediately in our subsequent discussion.

Fuzzy topology, Axiom of separation, Remote neighborhood, Fuzzy unit interval, Fuzzy real line

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2009年06月16日

【期刊论文】Inverse limits in category LTop (II) 1

李生刚, Sheng-Gang Li

Fuzzy Sets and Systems 109(2000)291-299,-0001,():

-1年11月30日

摘要

This paper is a sequel to Li (1999). For some classes F of L-valued Zadeh functions, we will discuss two problems connected with inverse limits in LTop, K1HLTop and K2HLTop: (1) Will the condition that all L-valued Zadeh functions between factor L-fts of two given inverse systems are in F imply that the induced limit LTop-morphism is in F? (2) Will the condition that all bonding L-valued Zadeh functions are in F imply that all projective L-valued Zadeh functions are in F?

Fuzzy topology, Inverse limit, Projective L-valued Zadeh-function, Mapping between inverse systems, Limit LTop-morphism.,

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    西安交通大学,陕西

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