Main diagonal


In linear algebra, the main diagonal (sometimes principal diagonal, primary diagonal, leading diagonal, major diagonal, or good diagonal) of a matrix is the list of entries where . All off-diagonal elements are zero in a diagonal matrix. The following four matrices have their main diagonals indicated by red ones:

Antidiagonal edit

The antidiagonal (sometimes counter diagonal, secondary diagonal, trailing diagonal, minor diagonal, off diagonal, or bad diagonal) of an order   square matrix   is the collection of entries   such that   for all  . That is, it runs from the top right corner to the bottom left corner.


See also edit

References edit

  • Weisstein, Eric W. "Main diagonal". MathWorld.