DETERMINANT

THE BOX'S MAIN HELP:

This function returns the determinant of matrix M.
| M1x M2x M3x 0 | = M1x * ((M2y*M3z) - (M3y*M2z)) - 
| M1y M2y M3y 0 |   M2x * ((M1y*M3z) - (M3y*M1z)) +
| M1z M2z M3z 0 |   M3x * ((M1y*M2z) - (M2y*M1z)).
|  0   0   0  1 |

M (input):

This must be a matrix. The default is the identity matrix,
for which the determinant is 1.0.

OUT (output):

This function returns the determinant of matrix M.
| M1x M2x M3x 0 | = M1x * ((M2y*M3z) - (M3y*M2z)) - 
| M1y M2y M3y 0 |   M2x * ((M1y*M3z) - (M3y*M1z)) +
| M1z M2z M3z 0 |   M3x * ((M1y*M2z) - (M2y*M1z)).
|  0   0   0  1 |

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