4. Prove the uniqueness of the Laurent series in Theorem 5.1.4.
5. Leta∈C and 0r R∞. Suppose thatf∈H(A(a;r,R)) and|f(z)|≤Mfor
n=−∞
cn(z−a)nis the Laurent series off
onA(a;r,R), show that|cn|≤M/Rnfor alln≥0 and|cn|≤M/rnfor alln≤0.
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