We employ the notion of the universal differential calculus to propose yet another approach to the Hopf-type cohomology of Hopf algebras.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-bc61-0-14, author = {G. I. Sharygin}, title = {Hopf-type Cyclic Cohomology via the Karoubi Operator}, journal = {Banach Center Publications}, volume = {60}, year = {2003}, pages = {199-217}, zbl = {1061.58005}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc61-0-14} }
G. I. Sharygin. Hopf-type Cyclic Cohomology via the Karoubi Operator. Banach Center Publications, Tome 60 (2003) pp. 199-217. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc61-0-14/