Texas Instruments TI-73 Software Manual page 30

det( 1: Determinant
Returns the determinant (a real number) of matrixname . The
matrix must be square.
det( matrixname )
T 2: Transpose
Returns a matrix in which each element (row, column) is
swapped with the corresponding element (column, row) of
matrixname .
matrixname T
Matrices for the TI-73 Page 30