DifferentialGeometry/LieAlgebras/Query/NilRepresentation - Maple Help
For the best experience, we recommend viewing online help using Google Chrome or Mozilla Firefox.

Online Help

All Products    Maple    MapleSim


Home : Support : Online Help : DifferentialGeometry/LieAlgebras/Query/NilRepresentation

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

Description

• 

 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.

Examples

> 

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

(2.1)

 

Initialize the Lie algebra and create a 4-dimensional representation space.

> 

DGsetup⁡L:

alg1 > 

DGsetup⁡x1,x2,x3,x4,V

frame name: V

(2.2)

 

Define the adjoint representation.

V > 

ρ≔Representation⁡alg1,V,Adjoint⁡alg1

alg1 > 

Query⁡ρ,NilRepresentation

true

(2.3)

 

See Also

DifferentialGeometry

LieAlgebras

Query

Representation