What is the identity matrix?
The identity matrix has 1s running diagonally from top left to bottom right. All other entries are 0. It is like the number 1 for matrices. Multiplying matrix A by the identity returns matrix A unchanged. This makes the identity matrix very beneficial for linear algebra proofs and calculations. The identity matrix’s size must match the target matrix’s row/column count to leave it unaltered. It is an important instrument for comprehending matrix operations.