Timeline for 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?

10 events

when toggle format	what		by	license	comment
Dec 24, 2023 at 6:43	vote	accept	CommunityBot
Oct 12, 2022 at 21:16	history	edited	Didier		edited tags
Oct 12, 2022 at 8:30	comment	added	J.G.		The trace is $\delta_a{}^a$.
Oct 12, 2022 at 8:27	answer	added	Didier		timeline score: 1
Oct 12, 2022 at 7:59	comment	added	Didier		Then (3) is an expression for $n \cdot A^{ij}$, where $n$ is the dimension, as you noticed, and is not related to $A_{ij}$ in any way. What is your specific question then at this precise point?
Oct 12, 2022 at 7:57	comment	added	user759380		@Didier Hi there, I'm not trying to pass from $(2)$ to $(3)$, $(2)$ is not related to $(3)$ (as far as I can tell). Those expressions $(1-3)$ are simply possible answers to what $A_{ij}$ is equal to.
Oct 12, 2022 at 7:50	history	edited	user759380	CC BY-SA 4.0	Fixed grammar and typos in vector V
Oct 12, 2022 at 7:45	comment	added	Didier		I do not get how you are passing from (2) to (3). I think you are misinterpreting something at this precise point
Oct 12, 2022 at 7:45	history	edited	user759380	CC BY-SA 4.0	Improved title wording
Oct 12, 2022 at 4:38	history	asked	user759380	CC BY-SA 4.0