We state that the flag-transitive automorphism group of a 2-(v,5,λ) design D is primitive of affine type or almost simple type.We also find that there are up t
Let DN be the multicomponent twisted Heisenberg-Virasoro algebra.We compute the second continuous cohomology group with coefficients in C and study the bihamilt
We mainly study the super-biderivations of not-finitely graded Lie superalgebras related to generalized super-Virasoro algebras.In particular,we prove that all