K-THEORY, cilt.34, sa.2, ss.151-194, 2005 (SCI-Expanded)
We show that one can extend the definition of Hopf cyclic homology with coefficients such that one can use bialgebras and a larger class of coefficient module/co-modules. With the help of this extension, we calculate the bialgebra cyclic homology of U-q(g) the quantum deformation of an arbitrary semi-simple Lie algebra g and H(N) the Hopf algebra of foliations of codimension N, with several coefficient modules.