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D.3.2.9 adjoint

Procedure from library linalg.lib (see linalg_lib).

Usage:
adjoint(A); A = square matrix

Return:
adjoint matrix of A, i.e. Adj*A=det(A)*E

Note:
computation uses busadj(A)

Example:
 
LIB "linalg.lib";
ring r=0,(t,x),lp;
matrix A[2][2]=1,x2,x,x2+3x;
print(A);
==> 1,x2,  
==> x,x2+3x
matrix Adj[2][2]=adjoint(A);
print(Adj);                    //Adj*A=det(A)*E
==> x2+3x,-x2,
==> -x,   1   
print(Adj*A);
==> -x3+x2+3x,0,       
==> 0,        -x3+x2+3x