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Summing over set of sets

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#elementary-set-theory #summation #notation #taylor-expansion
60
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Closed form of the sum of two binomial expansions

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#combinatorics #summation #binomial-theorem
142
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Evaluate $\displaystyle\sum_{k=1}^n \left(\frac{{n-1 \choose k-1}}{k}\right)$

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#combinatorics #discrete-mathematics #summation
34
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Summation bounds for the following problem

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#discrete-mathematics #summation
58
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is it possible to find a closed expression to this?

Published on
#summation #induction #recurrence-relations
395
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Is it possible to pull constant out of this summation

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#summation #constants
147
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Finding the maximum value of summation of $\sin$ series.

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#sequences-and-series #summation #fourier-series
197
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Combinatorics floor summation $\sum_{i=0}^{\lfloor n/2\rfloor}\binom n{2i}p^{2i}(1-p)^{n-2i}=\frac12((2p-1)^n+1)$

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#probability #combinatorics #summation #binomial-coefficients #binomial-distribution
4.2k
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How to evaluate whether summation of $e^n/(ne^n+1)$ diverges or converges?

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#calculus #sequences-and-series #convergence-divergence #summation #divergent-series
32
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Have I been rigorous in this simple argument with summation and expectation operators?

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#probability #summation #expected-value
47
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How to prove a sum formula about powers of 2 and 3?

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#combinatorics #summation #induction #exact-sequence
362
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Prove $\sum_k{2k\choose k}^2{2\left(n-k\right)\choose n-k}^2=\sum_k(-1)^k16^k{n-k \choose k}{2\left(n-k\right)\choose n-k}^3$

Published on
#calculus #combinatorics #summation
102
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A guy with keys trynna open door [ E(X) and Var(X) problem]

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#probability #measure-theory #summation #random-variables
29
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Evaluating a finite summation

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#summation
70
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Finding a difficult inverse Laplacetransform

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#definite-integrals #summation #exponential-function #inverse #laplace-transform

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