Every filter is contained in a maximal filter, called ultrafilter.
每个滤子包含在一个极大的滤子里, 一个极大滤子称为一个超滤子.
This idempotent ultrafilter enables us to find an appropriate infinite set.
这个幂等的超滤子能使我们找到一个适当的无限集.
ObjectiveTo investigate the therapeutic efficacy and economic analysis of ultrafilter concentration in refractory ascites.
研究腹水超滤浓缩腹腔回输治疗难治性腹水的临床疗效并进行经济学评价.