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math.RA2026
Rigidity and Cohomology of Seaweed Lie Algebras
Vincent E. Coll, Alan Hylton
Seaweed (biparabolic) subalgebras form a large and structurally rich class of subalgebras of simple Lie algebras. We determine their adjoint cohomology. If is an ind…
math.RA2026
Deformations of Jordan Algebras via the Jordan Defect: An Explicit Low--Degree Deformation Complex
Vincent E. Coll
Over a field of characteristic we give a concrete, computation--ready description of Jordan algebra structures and their low--order deformation theory. The Jordan identity is q…