From(投稿者): | cchikakoo@yahoo.co.jp |
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Newsgroups(投稿グループ): | fj.sci.math |
Subject(見出し): | Re: $B<-=q<0 (B |
Date(投稿日時): | Sun, 14 Sep 2008 16:51:45 -0700 (PDT) |
Organization(所属): | http://groups.google.com |
References(祖先記事, 一番最後が直親): | (G) <1b516893-9f9a-4205-85c5-782f855d21d9@w24g2000prd.googlegroups.com> |
(G) <080914222331.M0103766@cs2.kit.ac.jp> | |
(G) <84c0b9bf-f01d-40f7-b7ec-cc6c876f45de@s1g2000pra.googlegroups.com> | |
Message-ID(記事識別符号): | (G) <3b377f72-5700-4d88-8ac9-a1b9ab864383@s28g2000prd.googlegroups.com> |
> O:={{y∈A;y<a}∈2^A;a∈A},{{y∈A;y>a}∈2^A;a∈A},{{y∈A;a<y<b}∈2^A;a,b∈A},A} これは O:={{y∈A;y<'a}∈2^A;a∈A}∪{{y∈A;y>'a}∈2^A;a∈A}∪{{y∈A;a<'y<'b}∈2^A;a,b∈A}∪{A} ですね。