List questions from exponential-sum

Published on 23 Feb 2026 - 11:40

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orthogonality of complex exponentials

Published on 20 Jul 2019 - 17:17

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Why is $\sum_{k=0}^\infty e^{-\beta k} \frac{e^{-\mu t} (\mu t)^k}{k!} = \exp[-\mu t(1 - e^{-\beta})]$?

Published on 22 Jul 2019 - 5:45

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Conditional probability of sum of exponential random variables

Published on 22 Jul 2019 - 22:30

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Sum of exponential growth and decay

Published on 28 Jul 2019 - 23:44

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Solve inequality involving double summation, exponentiation and $\ln$

Published on 02 Aug 2019 - 10:18

227

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Inequality involving double summation

Published on 25 Mar 2026 - 4:38

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What is the series $\sum_{n=1}^{\infty} \frac{e^{-n^2 x}}{n}$?

Published on 04 Aug 2019 - 21:07

301

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Finding a closed form solution for an infinite sum

Published on 08 Aug 2019 - 21:56

323

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Infinite sum of cos(ln(n))/n

Published on 01 Sep 2019 - 22:16

64

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Writing an exponential formula where the factor decreases by $10%$ each time

Published on 10 Sep 2019 - 16:10

52

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Exponential formula with decreasing multiplication factor

Published on 11 Sep 2019 - 7:58

40

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How is the last step of this sum derived?

Published on 25 Sep 2019 - 2:40

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Baker-Hausdorff Lemma from Sakurai's book

Published on 13 Mar 2014 - 20:16

113

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For which $m$ is this sum of roots of unity $0$?

Published on 01 Apr 2014 - 19:01

List Question

Exponential Growth rate of population

orthogonality of complex exponentials

Why is $\sum_{k=0}^\infty e^{-\beta k} \frac{e^{-\mu t} (\mu t)^k}{k!} = \exp[-\mu t(1 - e^{-\beta})]$?

Conditional probability of sum of exponential random variables

Sum of exponential growth and decay

Solve inequality involving double summation, exponentiation and $\ln$

Inequality involving double summation

What is the series $\sum_{n=1}^{\infty} \frac{e^{-n^2 x}}{n}$?

Finding a closed form solution for an infinite sum

Infinite sum of cos(ln(n))/n

Writing an exponential formula where the factor decreases by $10%$ each time

Exponential formula with decreasing multiplication factor

How is the last step of this sum derived?

Baker-Hausdorff Lemma from Sakurai's book

For which $m$ is this sum of roots of unity $0$?

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