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돌아가기

임의의 집합에 군 구조를 줄 수 있다 (비교)

r1 ➤ r2
1[Include(틀:가져옴,O=오메가, C=[[https://creativecommons.org/licenses/by-nc-sa/3.0/deed.ko|CC BY-NC-SA 3.0]], L=[[https://web.archive.org/web/20160316000158/http://mathwiki.net/%EC%9E%84%EC%9D%98%EC%9D%98_%EC%A7%91%ED%95%A9%EC%97%90_%EA%B5%B0_%EA%B5%AC%EC%A1%B0%EB%A5%BC_%EC%A4%84_%EC%88%98_%EC%9E%88%EB%8B%A4|링크]])[분류:가져온 문서/오메가]]
21* [[http://mathoverflow.net/users/2689/ashutosh|Ashutosh]], [[https://mathoverflow.net/questions/12973/does-every-non-empty-set-admit-a-group-structure-in-zf/12988#12988|Does every non-empty set admit a group structure (in ZF)?, version: 2010-02-01]]
22
23[Include(틀:가져옴,O=오메가, C=[[https://creativecommons.org/licenses/by-nc-sa/3.0/deed.ko|CC BY-NC-SA 3.0]], L=[[https://web.archive.org/web/20160316000158/http://mathwiki.net/%EC%9E%84%EC%9D%98%EC%9D%98_%EC%A7%91%ED%95%A9%EC%97%90_%EA%B5%B0_%EA%B5%AC%EC%A1%B0%EB%A5%BC_%EC%A4%84_%EC%88%98_%EC%9E%88%EB%8B%A4|링크]])]