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D.3.2.3 inverse_L
Procedure from library linalg.lib (see linalg_lib).
- Usage:
- inverse_L(A); A = square matrix
- Return:
- list Inv representing a left inverse of A, i.e
- Inv[1] = matrix I and
- Inv[2] = poly p
such that I*A = unitmat(n)*p;
- Note:
- p=1 if 1/det(A) is computable and p=det(A) if not;
the computation computes first det(A) and then uses lift
Example:
| LIB "linalg.lib";
ring r=0,(x,y),lp;
matrix A[3][3]=x,y,1,1,x2,y,x,6,0;
print(A);
list Inv=inverse_L(A);
print(Inv[1]);
print(Inv[2]);
print(Inv[1]*A);
| See also:
inverse;
inverse_B.
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