|
 |
 |
 |
 |
 |
 |
 |
 |
 |
7.5.20.0. UpOneMatrix
Procedure from librarynctools.lib (see nctools_lib).
- Usage:
- UpOneMatrix(n); n an integer
- Return:
- intmat
- Purpose:
- compute an n x n matrix with 1's in the whole upper triangle
- Note:
- helpful for setting noncommutative algebras with complicated
coefficient matrices
LIB "nctools.lib"; ring r = (0,q),(x,y,z),dp; matrix C = UpOneMatrix(3); C[1,3] = q; print(C); ==> 0,1,(q), ==> 0,0,1, ==> 0,0,0 def S = nc_algebra(C,0); setring S; S; ==> // coefficients: QQ(q) ==> // number of vars : 3 ==> // block 1 : ordering dp ==> // : names x y z ==> // block 2 : ordering C ==> // noncommutative relations: ==> // zx=(q)*xz |