Question

Levi-Civita and and Kronecker delta identity

score 469 · Answer 1 · 2026-04-13 07:27:05

469

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Levi-Civita and and Kronecker delta identity

Published on 13 Apr 2026 - 7:27

score 55 · Answer 2 · 2026-04-15 11:40:26

55

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Is there an expression for $i, j, k \in \left\{1,\, 2,\, 3\right\}$ with $i \neq j \neq k$?

Published on 15 Apr 2026 - 11:40

score 165 · Answer 3 · 2026-04-09 17:14:17

165

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Matrix written in terms of Kronecker delta

Published on 09 Apr 2026 - 17:14

score 51 · Answer 4 · 2026-04-12 00:17:30

51

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Sum Simplification

Published on 12 Apr 2026 - 0:17

score 58 · Answer 5 · 2026-03-25 16:13:45

58

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Prove that $\delta_{jl}\delta_{im}=\delta_{jm}\delta_{il}$

Published on 25 Mar 2026 - 16:13

score 116 · Answer 6 · 2026-03-25 16:13:30

116

Views

How do I simplify $\delta_{ij} \delta^{jk}$?

Published on 25 Mar 2026 - 16:13

score 33 · Answer 7 · 2026-04-12 11:26:36

33

Views

Tensor calculus: problem with second order delta systems property

Published on 12 Apr 2026 - 11:26

score 42 · Answer 8 · 2026-04-13 08:06:05

42

Views

Expression with Kronecker Delta over upper triangular Matrix

Published on 13 Apr 2026 - 8:06

score 32 · Answer 9 · 2026-04-13 06:24:32

32

Views

Expression with Triple Sum of Kronecker Delta

Published on 13 Apr 2026 - 6:24

score 46 · Answer 10 · 2026-04-15 23:36:51

46

Views

Volume integral over dyadic: Is it true that $\int_{\mathbb{R}^3} d^3 \vec{x}\; x_i x_j f(|\vec{x}|) \ \propto \ \delta_{ij}$?

Published on 15 Apr 2026 - 23:36

score 399 · Answer 11 · 2026-04-15 07:49:33

399

Views

Is the type $(1,1)$ Kronecker delta tensor, $\delta_a^{\,\,b}$ equal to the trace of the identity matrix or always $1$ when $a=b$ and zero otherwise?

Published on 15 Apr 2026 - 7:49

score 177 · Answer 12 · 2026-04-15 18:50:13

177

Views

Alternate multinomial theorem for $\frac{d^n}{dx^n}\prod\limits_{k=1}^m f_k(x)$ without $\sum\limits_{k_1+\dots+k_m=n}$ nor Kronecker delta.

Published on 15 Apr 2026 - 18:50

score 39 · Answer 13 · 2026-04-17 11:24:23

39

Views

Why $a_i b_m c_n\left(\delta_{m k} \delta_{n i}-\delta_{m i} \delta_{n k}\right) \mathbf{e}_k=a_n b_m c_n \mathbf{e}_m-a_m b_m c_n \mathbf{e}_n$?

Published on 17 Apr 2026 - 11:24

score 38 · Answer 14 · 2026-04-10 16:26:27

38

Views

Simplify recursive equation $h(n) = \alpha h(n-1) + (1-\alpha)\delta(n)$

Published on 10 Apr 2026 - 16:26

score 41 · Answer 15 · 2026-04-10 21:56:54

41

Views

Summation in closed form

Published on 10 Apr 2026 - 21:56

List Question

Levi-Civita and and Kronecker delta identity

Is there an expression for $i, j, k \in \left\{1,\, 2,\, 3\right\}$ with $i \neq j \neq k$?

Matrix written in terms of Kronecker delta

Sum Simplification

Prove that $\delta_{jl}\delta_{im}=\delta_{jm}\delta_{il}$

How do I simplify $\delta_{ij} \delta^{jk}$?

Tensor calculus: problem with second order delta systems property

Expression with Kronecker Delta over upper triangular Matrix

Expression with Triple Sum of Kronecker Delta

Volume integral over dyadic: Is it true that $\int_{\mathbb{R}^3} d^3 \vec{x}\; x_i x_j f(|\vec{x}|) \ \propto \ \delta_{ij}$?

Is the type $(1,1)$ Kronecker delta tensor, $\delta_a^{\,\,b}$ equal to the trace of the identity matrix or always $1$ when $a=b$ and zero otherwise?

Alternate multinomial theorem for $\frac{d^n}{dx^n}\prod\limits_{k=1}^m f_k(x)$ without $\sum\limits_{k_1+\dots+k_m=n}$ nor Kronecker delta.

Why $a_i b_m c_n\left(\delta_{m k} \delta_{n i}-\delta_{m i} \delta_{n k}\right) \mathbf{e}_k=a_n b_m c_n \mathbf{e}_m-a_m b_m c_n \mathbf{e}_n$?

Simplify recursive equation $h(n) = \alpha h(n-1) + (1-\alpha)\delta(n)$

Summation in closed form

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