ultrafilter
n. 实验室中使用的高度精密过滤器 v. 用过滤器过滤
词形变化
ultrafilters
复数
ultrafilters
ultrafiltering
ultrafilters
三单
ultrafiltering
现在分词
ultrafiltered
过去式
ultrafiltered
过去分词
释义与例句
n.
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1.
A device that performs ultrafiltration.
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2.
A proper filter which has a law of dichotomy for complements.
数学 -
3.
A filter (subset of a poset) that is maximal as a set with respect to the definition of proper filter.
数学An ultrafilter is maximal in the sense that if any other element of the poset not already in it were added to it, one could deduce (from the laws which define the filter, and the given ordering relation, i.e., the structure of the poset) that the resulting filter must be improper; i.e., it must contain all the elements of the poset.
v.
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1.
To filter by ultrafiltration.
及物
相关短语
词源
From ultra- + filter.
来源：wiktionary