Query[NilRepresentation] - check if a representation of a Lie algebra is nilpotent
Calling Sequences
Query(rho, NilRepresentation)
Parameters
rho - a representation of a Lie algebra
Description
Examples
Let g be a Lie algebra, V a vector space and ρ:𝔤 → glV a representation. This query returns true if for each x ∈ 𝔤 , the matrix ρx is nilpotent, that is, ρxr =0 for some positive integer r.
with⁡DifferentialGeometry:with⁡LieAlgebras:with⁡Library:
Example 1.
Retrieve the structure equations for a Lie algebra from the DifferentialGeometry library.
L≔Retrieve⁡Winternitz,1,4,1,alg1
L:=e2,e4=e1,e3,e4=e2
Initialize the Lie algebra and create a 4-dimensional representation space.
DGsetup⁡L:
DGsetup⁡x1,x2,x3,x4,V
frame name: V
Define the adjoint representation.
ρ≔Representation⁡alg1,V,Adjoint⁡alg1
Query⁡ρ,NilRepresentation
true
See Also
DifferentialGeometry
LieAlgebras
Query
Representation
Download Help Document