QuotientAlgebra

QuotientAlgebra[L, I]
gives the structure constants of the quotient alebgra L/I.
  • The Lie algebra L and the subalgebra I can be provided either from their structure constants or their infinitesimal generator representation. When providing the Lie algebra L with its structure constants denote the elements of the subspaces by using the symbol X, e.g. {X[1], X[4]}.
  • The command checks if the supplied subalgebra I is indeed an ideal of the Lie algebra L.
  • If the null ideal is given ({}) then the structure constants of the initial Lie algebra will be returned.
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Calculation of the quotient algebra using the infinitesimal representation of the Lie algebra
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the quotient algebra is isomorphic to (2):
 
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The same quotient algebra using this time the structure constants of the Lie algebra.
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