Perform matrix operations: addition, multiplication, determinant, and inverse.
Matrix A
Matrix B
Matrix A (m×n) can multiply B (n×p) — A's columns must equal B's rows. Result is m×p.
A scalar value from a square matrix. If det ≠ 0, the matrix is invertible.
Matrix A⁻¹ where A × A⁻¹ = I (identity). Only exists when determinant is non-zero.