基于定向偏序集理论给出了区间值三角模左连续的充要条件,证明了区间值三角模左连续当且仅当该三角模保定向并。
Based on the theory of directed partial order sets a necessary and sufficient condition for interval-valued triangalar norms being left-continuous was obtained. The interval-valued triangular norm is left-continuous if and only if it preserves directed joins.