실체에 이르는 길(로저 펜로즈)

http://scienceon.hani.co.kr/archives/13582

 

preface

• 분수와 equivalence class 의 예

 

 

1 The roots of science

the main thrust of this book has to do with the Wrst of these mysteries: the remarkable relationship between
mathematics and the actual behaviour of the physical world.