List questions from summation

Published on 27 Mar 2026 - 16:53

75

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Summation of perpendiculars on a triangle

Published on 27 Mar 2026 - 0:02

616

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Notation of symmetric sum notation

Published on 30 Mar 2026 - 2:04

122

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An observation of prime number, not sure if this always hold

Published on 28 Mar 2026 - 11:34

180

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Is there another way of evaluating $\lim_{x \to 0} \Gamma(x)(\gamma+\psi(1+x))=\frac{\pi^2}{6}$

Published on 25 Mar 2026 - 21:54

68

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Is there a good resource for information on infinite double series?

Published on 24 Mar 2026 - 23:45

132

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Rigorously proving that $\sum_{k=1}^{n}\sum_{j=1}^{k}d_j$ is equal to $\sum_{k=0}^{n-1}(n-k)d_{k+1}$

Published on 25 Mar 2026 - 1:18

23

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Conditional convergence equivalents

Published on 03 Aug 2018 - 20:31

341

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Method of differences summation

Published on 25 Mar 2026 - 16:05

1.1k

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Sum of a Sequence of Odd Numbers that are Squared

Published on 25 Mar 2026 - 1:17

355

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inequality involving $(xy+yz+zx)^3$ and the $pqr$ method

Published on 25 Mar 2026 - 16:03

504

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How to find the sum of $1+(1+r)s+(1+r+r^2)s^2+\dots$?

Published on 25 Mar 2026 - 9:43

207

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Why for $k$ odd, $(1+2+...+n)$ divides $(1^k+2^k+...n^k)$?

Published on 05 Aug 2018 - 20:09

1.4k

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Variable in upper bound of sum

Published on 25 Mar 2026 - 20:41

230

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Sum of product of binomial coefficients & powers: closed-form?

Published on 27 Mar 2026 - 4:38

List Question

Question concerning sigma notation

Summation of perpendiculars on a triangle

Notation of symmetric sum notation

An observation of prime number, not sure if this always hold

Is there another way of evaluating $\lim_{x \to 0} \Gamma(x)(\gamma+\psi(1+x))=\frac{\pi^2}{6}$

Is there a good resource for information on infinite double series?

Rigorously proving that $\sum_{k=1}^{n}\sum_{j=1}^{k}d_j$ is equal to $\sum_{k=0}^{n-1}(n-k)d_{k+1}$

Conditional convergence equivalents

Method of differences summation

Sum of a Sequence of Odd Numbers that are Squared

inequality involving $(xy+yz+zx)^3$ and the $pqr$ method

How to find the sum of $1+(1+r)s+(1+r+r^2)s^2+\dots$?

Why for $k$ odd, $(1+2+...+n)$ divides $(1^k+2^k+...n^k)$?

Variable in upper bound of sum

Sum of product of binomial coefficients & powers: closed-form?

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