Complex limits proof

label Mathematics
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Suppose lim(z→z0) f(z) = C =/= 0. Prove that there exists δ > 0 such that |f(z)| > ½ |C| for 0 < |z − z0| < δ.

Mar 17th, 2015

The last inequality shows that for 0 < |z - z_0| < delta, |f(z)| > |C|/2.

Mar 17th, 2015

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Mar 17th, 2015
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Mar 17th, 2015
Jun 29th, 2017
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