[分析] 一題有關uniform convergence(from Apostol)

看板Math作者 (パイナップル)時間15年前 (2011/01/18 23:13), 編輯推噓4(403)
留言7則, 4人參與, 最新討論串1/1
∞ Prove that Σ(x^(2n+1)/(2n+1)-x^(n+1)/(2n+2)) converges pointwise n=0 but not uniformly on [0,1]. 我會證pointwise的部份 可是uniformly的部份就想不太到了... 有高手能給些提示嗎?? 謝謝>"< -- Fermat's Last Theorem: There are no positive integers a, b, c satisfy the identiy a^n+b^n=c^n, where n is an integer greater than 2. Proof: The proof is trivial so we leave it to the reader as an exercise. -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 111.70.136.114

01/18 23:16, , 1F
均勻收斂會將連續性帶著走. 這級數不會是連續函數.
01/18 23:16, 1F

01/18 23:16, , 2F
簽名檔XD Wiles: 老師對不起我遲交,這次習題好難 *_*
01/18 23:16, 2F

01/18 23:18, , 3F
嗯...我就卡在不會證這不是連續函數@@
01/18 23:18, 3F

01/18 23:21, , 4F
想想 log.
01/18 23:21, 4F

01/18 23:42, , 5F
簽名檔XDDD 我最討厭原文書這樣寫了XD
01/18 23:42, 5F

01/18 23:56, , 6F
嗯 我用微分直接找series的值證出來了 在1不連續
01/18 23:56, 6F

01/18 23:56, , 7F
感謝提示~~
01/18 23:56, 7F
文章代碼(AID): #1DDQtzzg (Math)