Tetramodule is a vector space supplied with the bimodule and bicomodule structures over a Hopf algebra. The exact definition is given. Some properties and applications to quantum groups are discussed.
ArXiv: High Energy Physics - Theory, hep-th/9404043
Comments: 9 pages
Journal-ref: IMRN, No.7, 275-284 (1994).
Revised December 1996