26 :132人目の素数さん [] :2020/02/14(金) 10:41:11.19 ID:IkP9ro1f
James R. Munkres著『Topology 2nd Edition』を読んでいます。


Working problems is a crucial part of learning mathematics. No one can learn topology merely by poring
over the definitions, theorems, and examples that are worked out in the text. One must work part of it out
for oneself. To provide that opportunity is the purpose of the exercises.


などと書かれているので、はじめは解く気がなかったのですが、問題もすべて解くことにします。