Aa. Vladimirov, COADDITIVE DIFFERENTIAL COMPLEXES ON QUANTUM GROUPS AND QUANTUM SPACES, Journal of physics. A, mathematical and general, 27(13), 1994, pp. 4497-4504
A regular way to define an additive coproduct (or coaddition) on q-def
ormed differential complexes is proposed for quantum groups and quantu
m spaces related to the Hecke-type R-matrices. Several examples of bra
ided coadditive differential bialgebras (Hopf algebras) are presented.