Undergrad Un-skewing a skew symmetric matrix (for want of a better phrase)

Click For Summary
The discussion centers on the terminology used to describe the process of converting a column vector into a skew symmetric matrix and vice versa. The original poster seeks a more precise phrase for "unskewing the skew symmetric matrix." They mention that representing a skew symmetric 3x3 matrix by a vector in R^3 could be a more formal way to express this concept. The conversation emphasizes finding a suitable term rather than delving into the underlying algebraic principles. Ultimately, clarity in terminology is the primary focus of the discussion.
Trying2Learn
Messages
375
Reaction score
57
TL;DR
A better term for the process of creating a skew symmetric matrix
Hello

Say I have a column of components

v = (x, y, z).

I can create a skew symmetric matrix:

M = [0, -z, y; z, 0; -x; -y, x, 0]

I can also go the other way and convert the skew symmetric matrix into a column of components.

Silly question now...

I have, in the past, referred to this as "skewing a column into a skew symmetric matrix" or "unskewing the skew symmetric matrix."

Is there a better phrase to describe this? (mostly, the second one).

(And forget the algebra and the reasons... I just need the term that best describes the process.)
 
Physics news on Phys.org
Representing a skew symmetric 3x3 matrix by a vector in ##\mathbb{R}^3## would be the fancy way of saying it.
 
I am studying the mathematical formalism behind non-commutative geometry approach to quantum gravity. I was reading about Hopf algebras and their Drinfeld twist with a specific example of the Moyal-Weyl twist defined as F=exp(-iλ/2θ^(μν)∂_μ⊗∂_ν) where λ is a constant parametar and θ antisymmetric constant tensor. {∂_μ} is the basis of the tangent vector space over the underlying spacetime Now, from my understanding the enveloping algebra which appears in the definition of the Hopf algebra...

Similar threads

  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 7 ·
Replies
7
Views
685
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K