A central closure construction for certain extensions. Applications to Hopf algebra actions

A certain class of standard subalgebras of affine Kac-Moody algebras

A characterisation of nilpotent Lie algebras by invertible Leibniz-derivations

A Characterization of Certain Morphic Trivial Extensions

A characterization of Leonard pairs using the notion of a tail

A characterization of nilpotent Leibniz algebras

A characterization of quiver algebras based on double derivations

A characterization of trace zero symmetric nonnegative 5x5 matrices

A class of group-like object

A class of Locally Nilpotent Commutative Algebras

A class of nonassociative algebras and cogebras

A class of nonassociative algebras including flexible and alternative algebras, operads and deformations

A class of noncommutative projective surfaces

A class of quantum doubles which are ribbon algebras

A Class of Ring-like Objects

A class of Solvable Lie algebras

A Class of Strongly Homotopy Lie Algebras with Simplified sh-Lie Structures

A classification of bisymmetric polynomial functions over integral domains of characteristic zero

A Classification of Regressive Transformation Semigroups on Chains

A classification of sharp tridiagonal pairs