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作者 XII 在 PTT [ Math ] 看板的留言(推文), 共624則
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1F推:=>easy;<=(a)有cycle,then數歸,(b)by(a)07/27 23:59
3F推:#1E4ksdGP07/22 19:36
1F推:(a+1)^2/b+(b+1)^2/a=(a^2+1)/b+(b^2+1)/2+2a/b+2b/a07/20 23:42
2F→:≧2a/b+2b/a+2a/b+2b/a≧807/20 23:43
9F推:(a+1)^2/b+(b+1)^2/a≧4a/b+4b/a≧807/21 21:24
1F推:(x^2+9)(x^2+4)^207/19 19:31
1F推:d(B,(x,y))=a-cy/a07/10 00:01
2F→:剛剛打錯.. d(F,(x,y))=a-cy/a07/10 00:02
4F推:A+B=10,A-B=16x/10 => A=5+4x/5 => x=±10√2/307/07 00:26
2F推:2(C(2,2)+C(3,2)+..+C(n+1,2))=2C(n+2,3)06/20 23:25
1F推:找cycle的laplacian eigenvalue06/15 12:16
3F推:algebraic graph theory06/15 15:30
1F推:(3+4)*300=50+100*20.5 ==> 21次06/10 10:05
1F推:(1/1+1)(1/2+1)..(1/2011+1)-1=201106/10 01:17