Recent content by lee.spi

i was reading this book , it is a good book , thanks

now i understand,thanks

both “a distinguished collection of subsets”and “to be called the open sets” refer to the set T ?

what the following statement exactly mean :"A topological space is a set M with a distinguished collection of subsets,to be called the open sets".and I don't understand the meaning of "distinguished collection ".it's better have some example.thanks

I am Looking for some books about Differential Geometry,and I just begin to learn Differential Geometry,so who can introduce some books about Differential Geometry that suitable for Beginners to me,and tell me where can download the PDF document of the book. thanks

understand,thanks:biggrin:

by the way,what’s the meaning of “CW”? my English is poor,nevermind:biggrin:

ok,thanks

sorry,i can't find it,Road to Reality

this book is too expensive for me:cry:

understand,thanks

sorry,my English is poor,nevermind

Are you an expert with quaternionic quantum mechanics ? and Stephen L. Adler ,is he a friend of yours?

Do you have any interest in Quaternionic Quantum Mechanics? As far as i know, there are some people have interest in research a new formulation of quantum mechanics using quaternionic, rather than complex, numbers.''Quaternionic Quantum Mechanics and Quantum Fields'',by Stephen L. Adler ,who...

thanks for your explain in detail,and i think this will be helpful to me to get a better understand the uncertainty principle