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7.7.7.0. lieBracket
Procedure from library freegb.lib (see freegb_lib).
- Usage:
- lieBracket(a,b[,N]); a,b letterplace polynomials, N an optional integer
- Return:
- poly
- Assume:
- basering has a letterplace ring structure
- Purpose:
- compute the Lie bracket [a,b] = ab - ba between letterplace polynomials
- Note:
- if N>1 is specified, then the left normed bracket [a,[...[a,b]]]] is
computed.
Example:
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