REFERENCES
- Andruskiewitsch , N. , Schneider , H.-J. ( 2002 ). Pointed Hopf algebras . In: New Directions in Hopf Algebras . Vol. 43 . MSRI Publications , pp. 1 – 68 .
- Andruskiewitsch , N. , Schneider , H.-J. ( 2010 ). On the classification of finite-dimensional pointed Hopf algebras . Ann. Math. 171 : 375 – 471 .
- Fischman , D. , Montgomery , S. , Schneider , H.-J. ( 1997 ). Frobenius extensions of subalgebras of Hopf algebras . Trans. Amer. Math. Soc. 349 : 4857 – 4895 .
- Heckenberger , I. , Schneider , H.-J. ( 2013 ). Right coideal subalgebras of Nichols algebras and the Duflo order of the Weyl groupoid . Israel J. Math. 197 : 139 – 187 .
- Kassel , C. ( 1995 ). Quantum Groups . Springer .
- Larson , R. , Sweedler , M. ( 1969 ). An associative othogonal bilinear form for Hopf algebras . Amer. J. Math. 91 : 75 – 93 .
- Majid , S. ( 1994 ). Algebras and Hopf algebras in braided categories . Marcel Dekker L. N. in Math. 158 : 55 – 105 .
- Scharfschwerdt , B. ( 2001 ). The Nichols-Zoeller theorem for Hopf algebras in the category of Yetter-Drinfeld modules . Communication in Algebra 29 : 2481 – 2487 .
- Skryabin , S. ( 2007 ). Projectivity and freeness over comodule algebras . Trans. Amer. Math. Soc. 359 : 2597 – 2623 .
- Takeuchi , M. ( 1999 ). Finite Hopf algebras in braided tensor categories . J. Pure and Appl. Algebra 138 : 59 – 82 .
- Takeuchi , M. ( 2000 ). The Nichols-Zoeller theorem for braided Hopf algebras, Preprint .
- Takeuchi , M. ( 2000 ). Survey of braided Hopf algebras . In: New Trends in Hopf Algebra Theory . Contemporary Mathematics , Vol. 267 , pp. 301 – 323 .
- van Oystayen , F. , Skryabin , S. ( 2006 ). The Goldie theorem for H-semiprime algebras . J. Algebra 305 : 292 – 320 .
- Communicated by M. Cohen.