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Question: 5 for each of the sets in the above problems...

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5. For each of the sets in the above problems, which one is compact?
a) Let A = {z = x + iy | − 1 x 1, −1 < y < 1}.
b) Let A = { 1/n | n = 1, 2, 3, ...}.
c) Let R(r1, r2) = {z 2 C | r1 < |z| < r2}.
d) Let A = { 1n+1}1j=1 be a sequence of point in the unit disk (1).

COMPLEX ANALYSIS

5. For each of the sets in the above problems, which one is compact? b) Let A = {름 I n-1, 2, 3, ). 1, T2 d) Let A = {, } -1 be a sequence of point in the unit disk Δ(1) .

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