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7.7.16.0. makeWeyl
Procedure from library nctools.lib (see nctools_lib).
- Usage:
- makeWeyl(n,[p]); n an integer, n>0; p an optional integer (field characteristic)
- Return:
- ring
- Purpose:
- create the n-th Weyl algebra over the rationals Q or F_p
- Note:
- activate this ring with the "setring" command.
The presentation of an n-th Weyl algebra is classical: D(i)x(i)=x(i)D(i)+1,
where x(i) correspond to coordinates and D(i) to partial differentiations, i=1,...,n.
If p is not prime, the next larger prime number will be used.
Example:
| LIB "nctools.lib";
def a = makeWeyl(3);
setring a;
a;
==> // coefficients: QQ
==> // number of vars : 6
==> // block 1 : ordering dp
==> // : names x(1) x(2) x(3) D(1) D(2) D(3)
==> // block 2 : ordering C
==> // noncommutative relations:
==> // D(1)x(1)=x(1)*D(1)+1
==> // D(2)x(2)=x(2)*D(2)+1
==> // D(3)x(3)=x(3)*D(3)+1
| See also:
Weyl.
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