Question

proving ring of convergence $fg=\sum\limits_{m,n=-\infty}^{\infty} a_n b_m (z-z_0)^{n+m}$

score 75 · Answer 1 · 2026-03-27 01:46:47

75

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proving ring of convergence $fg=\sum\limits_{m,n=-\infty}^{\infty} a_n b_m (z-z_0)^{n+m}$

Published on 27 Mar 2026 - 1:46

score 867 · Answer 2 · 2019-06-04 04:33:46

867

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Proof: Complex number convergence

Published on 04 Jun 2019 - 4:33

score 52 · Answer 3 · 2019-06-04 04:56:46

52

Views

A set in a disc

Published on 04 Jun 2019 - 4:56

score 26 · Answer 4 · 2019-06-04 12:37:56

26

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The meaning of the notation $\mathbb C_{\text{Re}z\ge \alpha}$?

Published on 04 Jun 2019 - 12:37

score 86 · Answer 5 · 2026-04-02 03:53:16

86

Views

theorem on power series $\log(z^2-iz+2)$

Published on 02 Apr 2026 - 3:53

score 50 · Answer 6 · 2019-06-04 20:43:58

50

Views

Finding minimal polynomial given one root and two values

Published on 04 Jun 2019 - 20:43

score 173 · Answer 7 · 2019-06-05 10:49:08

173

Views

Prove inequality without using Möbius transformations

Published on 05 Jun 2019 - 10:49

score 201 · Answer 8 · 2019-06-05 13:39:50

201

Views

Sketching complex numbers with only the imaginary part

Published on 05 Jun 2019 - 13:39

score 209 · Answer 9 · 2026-03-27 14:58:44

209

Views

Convolution of absolute magnitude =/= absolute magnitude of convolution?

Published on 27 Mar 2026 - 14:58

score 35 · Answer 10 · 2026-04-08 05:04:44

35

Views

algebraic structure with complex numbers (symmetric element)

Published on 08 Apr 2026 - 5:04

score 56 · Answer 11 · 2019-06-05 18:45:02

56

Views

Dealing with the singularity of a complex polynomial in $1/z$

Published on 05 Jun 2019 - 18:45

score 91 · Answer 12 · 2026-03-28 00:37:30

91

Views

Is $f(z)=a_0+a_1\frac{1}{z}$ bounded on the right half-plane or on the closed planes $\{z\in\mathbb C:\text{Re}(z)\ge\alpha>0\}\subseteq\mathbb C$?

Published on 28 Mar 2026 - 0:37

score 61 · Answer 13 · 2026-03-27 18:49:35

61

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Evaluating the Sum $\sum_{r=1}^L \sum_{i=1}^L \left \lfloor \frac {L}{\left(\frac {r^2+i^2}{gcd(r,i)}\right)}\right \rfloor \cdot 2r$

Published on 27 Mar 2026 - 18:49

score 88 · Answer 14 · 2026-03-31 11:13:04

88

Views

Irreducible representations of $\mathbb{C}^{*}$

Published on 31 Mar 2026 - 11:13

score 1.3k · Answer 15 · 2019-06-06 22:09:37

1.3k

Views

complex logarithm negative real axis

Published on 06 Jun 2019 - 22:09

List Question

proving ring of convergence $fg=\sum\limits_{m,n=-\infty}^{\infty} a_n b_m (z-z_0)^{n+m}$

Proof: Complex number convergence

A set in a disc

The meaning of the notation $\mathbb C_{\text{Re}z\ge \alpha}$?

theorem on power series $\log(z^2-iz+2)$

Finding minimal polynomial given one root and two values

Prove inequality without using Möbius transformations

Sketching complex numbers with only the imaginary part

Convolution of absolute magnitude =/= absolute magnitude of convolution?

algebraic structure with complex numbers (symmetric element)

Dealing with the singularity of a complex polynomial in $1/z$

Is $f(z)=a_0+a_1\frac{1}{z}$ bounded on the right half-plane or on the closed planes $\{z\in\mathbb C:\text{Re}(z)\ge\alpha>0\}\subseteq\mathbb C$?

Evaluating the Sum $\sum_{r=1}^L \sum_{i=1}^L \left \lfloor \frac {L}{\left(\frac {r^2+i^2}{gcd(r,i)}\right)}\right \rfloor \cdot 2r$

Irreducible representations of $\mathbb{C}^{*}$

complex logarithm negative real axis

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