List questions from exponential-sum

Published on 17 Dec 2020 - 0:58

32

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Sum of double exponentials with different patterns.

Published on 04 Jan 2021 - 17:28

78

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Determinant of matrix with power series terms

Published on 04 Jan 2021 - 21:34

106

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summation methode of Fejér

Published on 26 Mar 2026 - 22:56

146

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Closed formula for sum of exponentials

Published on 21 Jan 2021 - 1:50

70

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$|\sum\limits_{k\in \mathbb{Z}}P(X=k)e^{ikt}|=1$ implies $X$ is almost surely constant

Published on 30 Jan 2021 - 15:22

26

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Expansion of $b^{(x+a)^{-n}}$ where $0 \le b \le 1$

Published on 04 Feb 2021 - 14:40

99

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Solving a Recurrence with a Summation of Exponents as a Term

Published on 21 Feb 2021 - 5:44

793

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Delta function and $\sum_{t}\exp\{ i k t\} $

Published on 25 Feb 2021 - 5:20

65

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how to show convergence and evaluate $n\sum_{k=1}^{2n} \frac{e^{-n/k}}{k^2}$

Published on 25 Feb 2021 - 9:43

82

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Can I treat $\Delta t$ in different ways when $\lim_{\Delta t \to 0}$? i.e. $\Delta t = 0$ in one section and $\Delta t = d t$ in another?

Published on 22 Mar 2021 - 18:27

59

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Infinite sum over $e^{i \frac{\pi (n-x)^2}{a}}$

Published on 26 Mar 2021 - 12:57

51

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Complex representation of a real wave

Published on 05 Apr 2021 - 11:57

41

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Bounds on $\lim_{m\to\infty}\sum_{s=x}^m\frac{s!}{s^n(s-x)!}$?

Published on 13 Apr 2021 - 2:59

315

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Is there a closed form for $ \sum_{i=1}^n \left(\frac{i}{x + i}\right)^{i y} $?

Published on 19 Apr 2021 - 22:24

List Question

Sum of powers of cosines over dyadic rationals

Sum of double exponentials with different patterns.

Determinant of matrix with power series terms

summation methode of Fejér

Closed formula for sum of exponentials

$|\sum\limits_{k\in \mathbb{Z}}P(X=k)e^{ikt}|=1$ implies $X$ is almost surely constant

Expansion of $b^{(x+a)^{-n}}$ where $0 \le b \le 1$

Solving a Recurrence with a Summation of Exponents as a Term

Delta function and $\sum_{t}\exp\{ i k t\} $

how to show convergence and evaluate $n\sum_{k=1}^{2n} \frac{e^{-n/k}}{k^2}$

Can I treat $\Delta t$ in different ways when $\lim_{\Delta t \to 0}$? i.e. $\Delta t = 0$ in one section and $\Delta t = d t$ in another?

Infinite sum over $e^{i \frac{\pi (n-x)^2}{a}}$

Complex representation of a real wave

Bounds on $\lim_{m\to\infty}\sum_{s=x}^m\frac{s!}{s^n(s-x)!}$?

Is there a closed form for $ \sum_{i=1}^n \left(\frac{i}{x + i}\right)^{i y} $?

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