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LieAlgebras[AscendingIdealsBasis] - find a basis for a solvable Lie algebra which defines an ascending chain of ideals
Calling Sequences
AscendingIdealsBasis(Alg)
Parameters
Alg - (optional) Maple name or string, the name of an initialized Lie algebra
Description
Every solvable Lie algebra admits a basis [e_1, e_2, ..., e_n] such that the vectors [e_1, e_2, ..., e_k] form an ideal in [e_1, e_2, ..., e_(k + 1)]. AscendingIdealsBasis calculates such a basis.
Examples
Example 1.
First we initialize a 5 dimensional Lie algebra.
We can use the command Query/"Solvable" to check that this is a solvable Lie algebra.
Now we calculate a basis with the ascending ideals property.
The following two commands check, for example, that B[1..3] is an ideal in B[1..4].
The command Query/"AscendingIdealsBasis" will verify that the basis B has the ascending ideals property.
The ascending ideals property becomes apparent if we re-initialize the Lie algebra using the basis B (using the command LieAlgebraData).
See Also
DifferentialGeometry, LieAlgebras, BracketOfSubspaces, GetComponents, MultiplicationTable, Query
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