det takes as argument a matrix A with coefficients in
Z/pZ.
det returns the determinant of this matrix A.
Computation are done in ℤ/pℤ by Gauss reduction.
Input :
Or :
Output :
hence, in ℤ/13ℤ, the determinant of A=[[1,2,9],[3,10,0],[3,11,1]] is 5%13 (in ℤ, det(A)=31).