|  |  D.2.3.1 A_Z Procedure from librarygeneral.lib(see  general_lib).
 
Example: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)
 |  | 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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