Hacker News
new
|
past
|
comments
|
ask
|
show
|
jobs
|
submit
login
coherentpony
on Nov 25, 2016
|
parent
|
context
|
favorite
| on:
Matrix Multiplication
Is that true for non-square matrices?
lkasjdklasdj
on Nov 25, 2016
[–]
Conjugation only makes sense for square matrices. More generally, left and right multiplication correspond to coordinate transformations of the output and input space, respectively.
coherentpony
on Nov 26, 2016
|
parent
[–]
If A is n x n and P is n x p then P is not square but P^T A P is well-defined.
Consider applying for YC's Winter 2026 batch! Applications are open till Nov 10
Guidelines
|
FAQ
|
Lists
|
API
|
Security
|
Legal
|
Apply to YC
|
Contact
Search:
