In mathematics, how to express "两者不能同时成立"? Is there any reference book from which I can learn the basic usages applied to the proofs in mathematics?
I met several problems these days, for instance, "两者不能同时成立" seems hard for me.
Thank you!
are you looking for "contradictory", in mathematic, it would be:

"contradictory opposite"　"矛盾否定"

"contradictory propositions"　"矛盾命題"

教育研究院, of taiwan has documentations of bilingual academic terms, the mathematical one is here, you may download it:

http://terms.naer.edu.tw/download/301/