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15
Math.TechQA.Club
2026-04-17 09:15:20
140
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What would be the closed form of $n\cdot n + (n-2)\cdot(n-2) + (n-4)\cdot(n-4) + \dots$?
Published on
17 Apr 2026 - 9:15
#sequences-and-series
#closed-form
112
Views
What is the series expansion of the $n$-th derivative of this : $\frac{d^n}{dx^n}\int{(e^{-x²})}^{\text{erf}(x)}dx$
Published on
16 Apr 2026 - 0:50
#sequences-and-series
#derivatives
#convergence-divergence
#taylor-expansion
#closed-form
86
Views
How to get a closed form for $\sum_{i=1}^n \frac{3^i}{2^i}$
Published on
14 Apr 2026 - 12:46
#summation
#algorithms
#closed-form
1.8k
Views
Difficult trigonometric integral. [Solved]
Published on
15 Apr 2026 - 1:54
#integration
#trigonometry
#definite-integrals
#closed-form
138
Views
Expanding product of binomials $(z^k + z^{-k})$
Published on
10 May 2026 - 19:47
#complex-numbers
#closed-form
#products
190
Views
How to solve the given integral avoiding infinite series sum?
Published on
11 May 2026 - 2:19
#integration
#definite-integrals
#logarithms
#closed-form
#hypergeometric-function
134
Views
Asymptotic approximation of a sum involving log and binomial coefficient
Published on
14 Apr 2026 - 21:00
#summation
#asymptotics
#binomial-coefficients
#approximation
#closed-form
96
Views
Closed form for $\sum_{m\geq 2, n\geq 2}\frac1{m^n-1}$
Published on
14 Apr 2026 - 16:11
#sequences-and-series
#summation
#closed-form
195
Views
Series of binomial coefficient denominators
Published on
11 May 2026 - 2:19
#sequences-and-series
#binomial-coefficients
#closed-form
#hypergeometric-function
#beta-function
208
Views
Finite sum of powers of $\log(j)$
Published on
13 Apr 2026 - 8:19
#logarithms
#closed-form
37
Views
Confusion on intuition for guessing a summation is a cubic
Published on
12 Apr 2026 - 21:39
#summation
#closed-form
269
Views
Does this recursive function have a closed-form solution?
Published on
10 May 2026 - 19:26
#closed-form
#recursion
#recursive-algorithms
407
Views
Closed form of finite Euler sum $\sum_{k=1}^n \frac{ H_{k}}{(2k+1)}$
Published on
10 May 2026 - 16:14
#summation
#closed-form
#harmonic-numbers
187
Views
Closed form of $\sum^\infty_{n=1} \frac{\sin n}n$
Published on
16 Apr 2026 - 4:44
#sequences-and-series
#closed-form
131
Views
How do I define the inverse of this function?
Published on
09 Apr 2026 - 4:58
#functions
#arithmetic
#inverse
#closed-form
#inverse-function
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