自然科学版
陕西师范大学学报(自然科学版)
数学与计算机科学
关于区间值三角模左(右)连续的充要条件
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王伟
(西安财经学院 信息与教育技术中心, 陕西 西安 710061)
王伟,男,高级工程师,主要从事计算机应用、知识与信息管理、多值逻辑等方面的研究.
摘要:
构造出了区间值三角模左连续与保任意并不等价的一个严格的反例;引入了三角模保递增并和保递减交的概念;证明了区间值三角模左连续的充要条件是保递增并,右连续的充要条件是保递减交.
关键词:
区间值三角模; 左连续; 保递增并
收稿日期:
2008-12-30
中图分类号:
O242.29
文献标识码:
A
文章编号:
1672-4291(2009)03-0020-03
基金项目:
国家自然科学基金资助项目(10771129); 陕西省自然科学基金资助项目(SJ08ZP14)
Doi:
Sufficient and necessary condition of left (tight)-continuity of interval valued t-norms
WANG Wei
(Information and Education Technology Center, Xi′an University of Finance and Economics, Xi′an 710061, Shaanxi, China)
Abstract:
A strict counter-example showing that left-continuity and union-preserving are not equivalent for interval-valued triangular norms is constructed. The concepts of increasing union-preserving and decreasing intersection-preserving for triangular norms are introduced. It is proved that a triangular norm  is left-continuous if and only if  is increasing union-preserving, and  is right-continuous if and only if  is decreasing intersection-preserving.
KeyWords:
interval-valued triangular norm; left-continuity; increasing union-preserving