Uper-triangular Matrix A square matrix A whose elements aij=0 for i>j is called upper triangular matrix.
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can anyone give me an exact definition of payroll matrix................
Identity or Unit Matrix If in the scaler matrix the value of k=1, the matrix is called the identity or unit matrix. It is denoted by I or U.
The determinant function is only defined for an nxn (i.e. square) matrix. So by definition of the determinant it would not exist for a 2x3 matrix.
Symmetric Matrix:Given a square matrix A such that A'=A, where A' is the transpose of A, then A is a symmetric matrix.note: No need to think about diagonal elements, they can be anything.
It looks like that's part of the definition of a unitary matrix. See related link, below.