Question

what is the value of $\sum_{ijk}\omega u_iu_j \delta_{ik}\delta_{kj}$?

score 104 · Answer 1 · 2019-07-27 12:11:12

104

Views

what is the value of $\sum_{ijk}\omega u_iu_j \delta_{ik}\delta_{kj}$?

Published on 27 Jul 2019 - 12:11

score 53 · Answer 2 · 2019-07-27 18:53:48

53

Views

Simple question about a formula for sums

Published on 27 Jul 2019 - 18:53

score 221 · Answer 3 · 2026-04-08 08:41:42

221

Views

Approximation of a sum by an integral

Published on 08 Apr 2026 - 8:41

score 412 · Answer 4 · 2026-03-26 04:38:08

412

Views

Infinite Series $\sum_{n=1}^{\infty}\frac{4^nH_n}{n^2{2n\choose n}}$

Published on 26 Mar 2026 - 4:38

score 186 · Answer 5 · 2026-04-01 10:25:47

186

Views

Prove a new digamma finite sum

Published on 01 Apr 2026 - 10:25

score 88 · Answer 6 · 2026-03-29 03:35:33

88

Views

Is there a way to simplify this sum $\sum_{i=1}^{h}\prod_{k=1}^i(2^{2^{h-k}} + 1),$?

Published on 29 Mar 2026 - 3:35

score 853 · Answer 7 · 2026-03-29 00:00:08

853

Views

Is there some series of operations that can achieve the effect of squaring every element of a matrix $X$?

Published on 29 Mar 2026 - 0:00

score 321 · Answer 8 · 2026-03-31 03:34:44

321

Views

Sums of binomial coefficients in which lower index remains fixed

Published on 31 Mar 2026 - 3:34

score 731 · Answer 9 · 2026-04-04 09:22:49

731

Views

Use conjunction / disjunction symbol like a summation symbol (over a set) - allowed?

Published on 04 Apr 2026 - 9:22

score 1k · Answer 10 · 2019-07-31 19:00:35

1k

Views

Is it legal to switch the bounds of a summation if upper bound is below lower bound?

Published on 31 Jul 2019 - 19:00

score 32 · Answer 11 · 2026-04-03 12:36:13

32

Views

How to find the roots of a sum of divisions of polynomials

Published on 03 Apr 2026 - 12:36

score 68 · Answer 12 · 2026-03-29 13:52:27

68

Views

Can someone verify this interesting Bell Polynomials Identity?

Published on 29 Mar 2026 - 13:52

score 228 · Answer 13 · 2026-04-06 06:04:10

228

Views

Inequality involving double summation

Published on 06 Apr 2026 - 6:04

score 259 · Answer 14 · 2026-03-31 17:59:57

259

Views

Prove $ \left(\sum \limits_{k=1}^n (2k-1)\frac{k+1}{k}\right) \left( \sum \limits_{k=1}^n (2k-1)\frac{k}{k+1}\right) \le \frac{9}{8}n^4$

Published on 31 Mar 2026 - 17:59

score 64 · Answer 15 · 2019-08-04 09:31:31

64

Views

Prove equivalence between sums of complex numbers.

Published on 04 Aug 2019 - 9:31

List Question

what is the value of $\sum_{ijk}\omega u_iu_j \delta_{ik}\delta_{kj}$?

Simple question about a formula for sums

Approximation of a sum by an integral

Infinite Series $\sum_{n=1}^{\infty}\frac{4^nH_n}{n^2{2n\choose n}}$

Prove a new digamma finite sum

Is there a way to simplify this sum $\sum_{i=1}^{h}\prod_{k=1}^i(2^{2^{h-k}} + 1),$?

Is there some series of operations that can achieve the effect of squaring every element of a matrix $X$?

Sums of binomial coefficients in which lower index remains fixed

Use conjunction / disjunction symbol like a summation symbol (over a set) - allowed?

Is it legal to switch the bounds of a summation if upper bound is below lower bound?

How to find the roots of a sum of divisions of polynomials

Can someone verify this interesting Bell Polynomials Identity?

Inequality involving double summation

Prove $ \left(\sum \limits_{k=1}^n (2k-1)\frac{k+1}{k}\right) \left( \sum \limits_{k=1}^n (2k-1)\frac{k}{k+1}\right) \le \frac{9}{8}n^4$

Prove equivalence between sums of complex numbers.

Trending Questions

Popular # Hahtags

Popular Questions