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D.2.3.1 A_Z
Procedure from library general.lib (see general_lib).
- Usage:
- A_Z("a",n); a any letter, n integer (-26<= n <=26, !=0)
- Return:
- string of n small (if a is small) or capital (if a is capital)
letters, comma separated, beginning with a, in alphabetical
order (or reverse alphabetical order if n<0)
Example:
| | LIB "general.lib";
A_Z("c",5);
==> c,d,e,f,g
A_Z("Z",-5);
==> Z,Y,X,W,V
ring R = create_ring("(0,"+A_Z("A",6)+")", "("+A_Z("a",10)+")", "dp");
R;
==> // coefficients: QQ(A, B, C, D, E, F)
==> // number of vars : 10
==> // block 1 : ordering dp
==> // : names a b c d e f g h i j
==> // block 2 : ordering C
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