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7.5.19.0. embedMat
Procedure from library nctools.lib (see nctools_lib).

Usage:
embedMat(A,m,n); A,B matrix/module

Return:
matrix

Purpose:
embed A in the left upper corner of mxn matrix

Example:
 
LIB "nctools.lib";
ring r = 0,(a,b,c,d),dp;
matrix M[2][3]; M[1,1]=a; M[1,2]=b;M[2,2]=d;M[1,3]=c;
print(M);
==> a,b,c,
==> 0,d,0 
print(embedMat(M,3,4));
==> a,b,c,0,
==> 0,d,0,0,
==> 0,0,0,0 
matrix N = M; N[2,2]=0;
print(embedMat(N,3,4));
==> a,b,c,0,
==> 0,0,0,0,
==> 0,0,0,0