Matrices
Category. Definitions
1. A matrix with n columns and m rows is a scheme of n m numbers of the form:
2. Two matrices are called similar, if they have the same number of rows and the same number of columns.
3. A matrix is called an n-row square matrix, when m = n:
B. Operations with matrices
C. rank of a matrix
A matrix has rank r, if at least one non-zero r-row subdeterminant can be formed from it, while all (r +1)-series of subdeterminants – if available – have the value zero.