Procedure from library matrix.lib (see matrix_lib).
matrix.lib
multrow(A,r,p); A matrix, p poly, r positive integer
matrix, A being modified by multiplying row r with p
Example:
LIB "matrix.lib"; ring r=32003,(x,y,z),lp; matrix A[3][3]=1,2,3,4,5,6,7,8,9; print(A); → 1,2,3, → 4,5,6, → 7,8,9 print(multrow(A,2,xy)); → 1, 2, 3, → 4xy,5xy,6xy, → 7, 8, 9