西瓜 9

The goal of logic and pure mathematics is to identify seemingly different terms and distinguish seemingly identical terms.

— Me@2011.08.16

— Me@2013.05.12

2013.05.12 Sunday (c) All rights reserved by ACHK

西瓜 9

The goal of logic and pure mathematics is to identify seemingly different terms and distinguish seemingly identical terms.

— Me@2011.08.16

— Me@2013.05.12

2013.05.12 Sunday (c) All rights reserved by ACHK