Class Operators for Compact Lie Groups
Classical -symbols and the tetrahedron.
Clifford fibrations and possible kinematics.
Comtrans algebras and their physical applications
Contractions of Lie algebras and algebraic groups
Degenerations, contractions and deformations of various algebraic structures play an important role in mathematics and physics. There are many different definitions and special cases of these notions. We try to give a general definition which unifies these notions and shows the connections among them. Here we focus on contractions of Lie algebras and algebraic groups.