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D.2.4.3 setglobalrings
Procedure from library grobcov.lib (see grobcov_lib).
- Usage:
- setglobalrings();
No arguments
- Return:
- After its call the rings @R=Q[a][x], @P=Q[a], @RP=Q[x,a] are
defined as global variables. (a=parameters, x=variables)
- Note:
- It is called internally by many basic routines of the
library grobcov, cgsdr, extend, pdivi, pnormalf, locus, locusdg,
envelop, envelopdg, and killed before the output.
The user does not need to call it, except when it is interested
in using some internal routine of the library that
uses these rings.
The basering R, must be of the form Q[a][x], (a=parameters,
x=variables), and should be defined previously.
Example:
| | LIB "grobcov.lib";
ring R=(0,a,b),(x,y,z),dp;
setglobalrings();
R;
==> // characteristic : 0
==> // 2 parameter : a b
==> // minpoly : 0
==> // number of vars : 3
==> // block 1 : ordering dp
==> // : names x y z
==> // block 2 : ordering C
Grobcov::@R;
==> // characteristic : 0
==> // 2 parameter : a b
==> // minpoly : 0
==> // number of vars : 3
==> // block 1 : ordering dp
==> // : names x y z
==> // block 2 : ordering C
Grobcov::@P;
==> // characteristic : 0
==> // number of vars : 2
==> // block 1 : ordering lp
==> // : names a b
==> // block 2 : ordering C
Grobcov::@RP;
==> // characteristic : 0
==> // number of vars : 5
==> // block 1 : ordering dp
==> // : names x y z
==> // block 2 : ordering lp
==> // : names a b
==> // block 3 : ordering C
ringlist(Grobcov::@R);
==> [1]:
==> [1]:
==> 0
==> [2]:
==> [1]:
==> a
==> [2]:
==> b
==> [3]:
==> [1]:
==> [1]:
==> lp
==> [2]:
==> 1,1
==> [4]:
==> _[1]=0
==> [2]:
==> [1]:
==> x
==> [2]:
==> y
==> [3]:
==> z
==> [3]:
==> [1]:
==> [1]:
==> dp
==> [2]:
==> 1,1,1
==> [2]:
==> [1]:
==> C
==> [2]:
==> 0
==> [4]:
==> _[1]=0
ringlist(Grobcov::@P);
==> [1]:
==> 0
==> [2]:
==> [1]:
==> a
==> [2]:
==> b
==> [3]:
==> [1]:
==> [1]:
==> lp
==> [2]:
==> 1,1
==> [2]:
==> [1]:
==> C
==> [2]:
==> 0
==> [4]:
==> _[1]=0
ringlist(Grobcov::@RP);
==> [1]:
==> 0
==> [2]:
==> [1]:
==> x
==> [2]:
==> y
==> [3]:
==> z
==> [4]:
==> a
==> [5]:
==> b
==> [3]:
==> [1]:
==> [1]:
==> dp
==> [2]:
==> 1,1,1
==> [2]:
==> [1]:
==> lp
==> [2]:
==> 1,1
==> [3]:
==> [1]:
==> C
==> [2]:
==> 0
==> [4]:
==> _[1]=0
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