Mathematics = Logic + Set Theory
— What is Mathematical Logic?
— by C. J. Ash, J. N. Crossley, C. J. Brickhill and J. C. Stillwell
2012.07.11 Wednesday ACHK
Daily Archives: July 11, 2012
以前拍下的照片, 2
自己孤伶伶一個人看著以前拍下的照片
= 自己看照片
— Me@2012-07-08 12:37:56 AM
2012.07.11 Wednesday (c) All rights reserved by ACHK
Physics Town 