List questions from exponential-sum

Published on 05 Apr 2026 - 19:32

86

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Exponential double angle formula

Published on 12 Apr 2026 - 8:44

298

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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 13 Apr 2026 - 18:41

36

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Sum of exponential series of equal mean and variance

Published on 15 Apr 2026 - 11:33

265

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

Published on 14 Apr 2026 - 14:25

2.4k

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Log-Sum-Exp as an approximation of min function

Published on 13 Apr 2026 - 18:36

81

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Exponential Type Series

Published on 15 Apr 2026 - 20:06

88

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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 16 Apr 2026 - 6:23

61

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Series: Product of power and exponential

Published on 17 Apr 2026 - 2:53

143

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

Published on 14 Apr 2026 - 2:39

77

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Series with exponential upper bound

Published on 14 Apr 2026 - 8:23

82

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Approximating a rational function by a rational of exponentials

Published on 14 Apr 2026 - 3:46

46

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How to compute sum

Published on 10 Apr 2026 - 2:03

95

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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 17 Apr 2026 - 9:49

70

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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 12 Apr 2026 - 7:26

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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