Every page in the KEVOS library tagged regular representation. 3 pages.
Finite-group representations convert group elements into matrices. Characters compress matrix information into class functions and make irreducible decomposition computable thro…
Representing a field element by its multiplication matrix, and reading trace, norm and characteristic polynomial off that matrix.
The standard, matrix, conjugate-vector and minimal-polynomial representations of an algebraic number, their relative costs, and how to convert between them.