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2.31.16  Inverse of a matrix with coefficients in ℤ/pℤ : inv inverse

inverse (or inv) takes as argument a matrix A in ℤ/pℤ.
inverse (ou inv) returns the inverse of the matrix A in Z/pℤ.
Input :

inverse([[1,2,9]%13,[3,10,0]%13,[3,11,1]%13])

Or :

inv([[1,2,9]%13,[3,10,0]%13,[3,11,1]%13])

Or :

inverse([[1,2,9],[3,10,0],[3,11,1]]%13)

Or :

inv([[1,2,9],[3,10,0],[3,11,1]]%13)

Output :

[[2%13,-4%13,-5%13],[2%13,0%13,-5%13], [-2%13,-1%13,6%13]]

it is the inverse of A=[[1,2,9],[3,10,0],[3,11,1]] in ℤ/13ℤ.


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