List questions from exponential-sum

Published on 14 Mar 2026 - 20:44

82

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Exponential double angle formula

Published on 14 Apr 2019 - 15:25

295

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Why is $\sum_{n=0}^{N-1}e^{-2i\pi(k+k_0)n/N}=N\delta(k-N+k_0)$?

Published on 19 Apr 2019 - 21:06

33

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Sum of exponential series of equal mean and variance

Published on 30 Apr 2019 - 19:00

262

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Evaluating $\sum_{n=0}^{\infty}ne^{1-n}$ using calculus

Published on 15 May 2019 - 5:38

2.4k

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Log-Sum-Exp as an approximation of min function

Published on 20 May 2019 - 18:09

77

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Exponential Type Series

Published on 22 May 2019 - 16:20

85

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Proving Finite Exponential Sum $\sum_{k\in\{0,r,...,N-r\}} \exp\left(\frac{2\pi ikl}{N}\right)=\sqrt{N/r}\text{ if l is integer multiple of N/r} $

Published on 28 May 2019 - 11:06

56

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Series: Product of power and exponential

Published on 06 Jun 2019 - 14:26

140

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What is exact value of $\sum_{n=1}^{\infty} \frac{1}{n^n}$ .

Published on 07 Jun 2019 - 19:44

74

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Series with exponential upper bound

Published on 08 Jun 2019 - 12:06

79

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Approximating a rational function by a rational of exponentials

Published on 13 Jun 2019 - 17:57

42

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How to compute sum

Published on 15 Jun 2019 - 10:58

92

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Evaluate $\frac {1+\frac {2^2}{2!} +\frac {2^4}{3!}+\frac {2^6}{4!} +\dots}{1+\frac {1}{2!}+\frac {2}{3!}+\frac {2^2}{4!}+\dots}$

Published on 16 Jun 2019 - 12:31

67

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How can I find the value of the unknown X using any algebraic method? Not numerical methods and programming.

Published on 10 Jul 2019 - 13:12

List Question

Find $P(X_1+X_2<X_3)$

Exponential double angle formula

Why is $\sum_{n=0}^{N-1}e^{-2i\pi(k+k_0)n/N}=N\delta(k-N+k_0)$?

Sum of exponential series of equal mean and variance

Evaluating $\sum_{n=0}^{\infty}ne^{1-n}$ using calculus

Log-Sum-Exp as an approximation of min function

Exponential Type Series

Proving Finite Exponential Sum $\sum_{k\in\{0,r,...,N-r\}} \exp\left(\frac{2\pi ikl}{N}\right)=\sqrt{N/r}\text{ if l is integer multiple of N/r} $

Series: Product of power and exponential

What is exact value of $\sum_{n=1}^{\infty} \frac{1}{n^n}$ .

Series with exponential upper bound

Approximating a rational function by a rational of exponentials

How to compute sum

Evaluate $\frac {1+\frac {2^2}{2!} +\frac {2^4}{3!}+\frac {2^6}{4!} +\dots}{1+\frac {1}{2!}+\frac {2}{3!}+\frac {2^2}{4!}+\dots}$

How can I find the value of the unknown X using any algebraic method? Not numerical methods and programming.

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