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D.2.12.5 defrings
Procedure from library ring.lib (see ring_lib).
- Usage:
- defrings(n,[p]); n,p integers
- Return:
- ring R with characteristic p [default: p=32003], ordering ds and n
variables x,y,z,a,b,...if n<=26 (resp. x(1..n) if n>26)
- Note:
- This proc uses 'execute' or calls a procedure using 'execute'.
Example:
| | LIB "ring.lib";
def S5=defrings(5,0); S5; "";
==> // coefficients: QQ
==> // number of vars : 5
==> // block 1 : ordering ds
==> // : names x y z a b
==> // block 2 : ordering C
==>
def S30=defrings(30); S30;
==> // coefficients: ZZ/32003
==> // number of vars : 30
==> // block 1 : ordering ds
==> // : names x(1) x(2) x(3) x(4) x(5) x(6) x(7) x(8) x(\
9) x(10) x(11) x(12) x(13) x(14) x(15) x(16) x(17) x(18) x(19) x(20) x(21\
) x(22) x(23) x(24) x(25) x(26) x(27) x(28) x(29) x(30)
==> // block 2 : ordering C
kill S5,S30;
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