超实讲义（英文影印版）出版时间：2011年版内容简介 i foundations1 what are the hyperreals？1.1 infinitely small and large1.2 historical background1.3 what is a real number？1.4 historical references2 large sets2.1 infinitesimals as variable quantities2.2 largeness2.3 filters2.4 examples of filters2.5 facts about filters2.6 zorn's lemma2.7 exercises on filters3 ultrap...
