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。
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.
左半脑以连续和分析的方式处理信息，当读文本或看电子数据表时更加活跃。
The left side of the brain processes information in an analytical and sequential way and is more active when people read text or look at a spreadsheet.
设G为局部紧群，在一致连续函数空间U（ G）上，用两种方法证明左不变平均和拓扑左不变的等价性。
On uniformly continuous function space U(G), Equivalence of invariant mean and topological invariant mean is showed by two methods.
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