Hi there,
I have to say that I don't like the
WeightVector(2,5) + ModuleOrder('c')
syntax. WeightVector is a modification of the following term order (in
Singular). It feels much more natural to me to simply do:
TermOrder('lex',weights=(2,5))
Also, I don't really understand what
> ring R =0,(x, y), (a(2,5), c, a(-1,-2), M(1,1,0,-1)); R;
// characteristic : 0
// number of vars : 2
// block 1 : ordering a
// : names x y
// : weights 2 5
// block 2 : ordering c
// block 3 : ordering a
// : names x y
// : weights -1 -2
// block 4 : ordering M
// : names x y
// : weights 1 1
// : weights 0 -1
> deg(x); // note that the 1st "a"/"M"/weighted ordering is used for "deg"
2
> deg(y);
5
does exactly. As far as I can see a(X,Y) modifies the following ordering which
eventually is the Matrix odering (1,1,0,-1). What's the role of the second
a(X,Y) in the example above?
Cheers,
Martin
--
name: Martin Albrecht
_pgp: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x8EF0DC99
_otr: 47F43D1A 5D68C36F 468BAEBA 640E8856 D7951CCF
_www: http://www.informatik.uni-bremen.de/~malb
_jab: martinralbre...@jabber.ccc.de
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