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D.3.1.4 dsum
Procedure from library matrix.lib (see matrix_lib).
- Usage:
dsum(A1,A2,..); A1,A2,... matrices
- Return:
matrix, direct sum of A1,A2,...
Example:
LIB "matrix.lib"; ring r = 0,(x,y,z),ds; matrix A[3][3] = 1,2,3,4,5,6,7,8,9; matrix B[2][2] = 1,x,y,z; print(A); → 1,2,3, → 4,5,6, → 7,8,9 print(B); → 1,x, → y,z print(dsum(A,B)); → 1,2,3,0,0, → 4,5,6,0,0, → 7,8,9,0,0, → 0,0,0,1,x, → 0,0,0,y,z |