First-order differential invariants of the splitting subgroups of the Poincaré group .
Fixed Points and D-branes
Free field construction of D-branes in rational models of CFT and Gepner models.
From Poisson algebras to Gerstenhaber algebras
Constructing an even Poisson algebra from a Gerstenhaber algebra by means of an odd derivation of square 0 is shown to be possible in the category of Loday algebras (algebras with a non-skew-symmetric bracket, generalizing the Lie algebras, heretofore called Leibniz algebras in the literature). Such “derived brackets” give rise to Lie brackets on certain quotient spaces, and also on certain Abelian subalgebras. The construction of these derived brackets explains the origin of the Lie bracket on...
Fusion algebras for superconformal field theories through coinvariants. II: super-Virasoro-symmetry.