→ WINDHEAD :essential singularity和residue都只對isolated 06/10 16:40
→ WINDHEAD :singularity 才有定義歐... 06/10 16:41
→ ntust661 :對阿@@ 06/10 16:51
推 jacky7987 :第一題是問收斂半徑嗎? 06/10 23:35
1 1 1 1
f(z) = ── + ── + ── + ── + ...
z z^2 z^3 z^4
(1).
是否 imply 1 < │z│ < ∞
(2).
Res f(z)│z=0 ≠ 1
(3).
z = 0 , is not an essential singularity
請高手解惑了>.<
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