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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:
 
See also: inverse; inverse_B.


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