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FS-coalgebras and crossed coproducts

  • Yuanyuan Chen , Zhongwei Wang and Liangyun Zhang EMAIL logo

Abstract

In this paper, we introduce FS-coalgebras, which provide solutions of FS-equations and also solution of braid equations considered by Caenepeel, Militaru and Zhu. FS-coalgebras are constructed by using FS-equations and Harrison cocycles. As applications, we prove that every bialgebra H is an FS-bialgebra if and only if there is a two-sided integral α in H such that ε(α)=1, and we show that the crossed coproduct HR introduced by the Harrison cocycle R is an FS-coalgebra when (H,R) is a finite-dimensional quasitriangular Hopf algebra or a Long copaired bialgebra.

MSC 2010: 16T05

Award Identifier / Grant number: 11401311

Award Identifier / Grant number: 11571173

Award Identifier / Grant number: BK20140676

Award Identifier / Grant number: BK20141358

Funding statement: This work is supported by the Fundamental Research Funds for the Central Universities (No. KJQN201550), the National Natural Science Foundation of China (11401311, 11571173), and the Natural Science Foundation of Jiangsu Province (BK20140676, BK20141358).

Acknowledgements

The authors would like to thank the referee for his/her helpful suggestions.

References

[1] L. Abrams, Two-dimensional topological quantum field theories and Frobenius algebras, J. Knot Theory Ramifications 5 (1996), no. 5, 569–587. 10.1142/S0218216596000333Search in Google Scholar

[2] L. Abrams, Modules, comodules, and cotensor products over Frobenius algebras, J. Algebra 219 (1999), no. 1, 201–213. 10.1006/jabr.1999.7901Search in Google Scholar

[3] M. Atiyah, An introduction to topological quantum field theories, Turkish J. Math. 21 (1997), no. 1, 1–7. Search in Google Scholar

[4] K. I. Beidar, Y. Fong and A. Stolin, On antipodes and integrals in Hopf algebras over rings and the quantum Yang–Baxter equation, J. Algebra 194 (1997), no. 1, 36–52. 10.1006/jabr.1996.7019Search in Google Scholar

[5] K. I. Beidar, Y. Fong and A. Stolin, On Frobenius algebras and the quantum Yang–Baxter equation, Trans. Amer. Math. Soc. 349 (1997), no. 9, 3823–3836. 10.1090/S0002-9947-97-01808-4Search in Google Scholar

[6] A. D. Bell and R. Farnsteiner, On the theory of Frobenius extensions and its application to Lie superalgebras, Trans. Amer. Math. Soc. 335 (1993), no. 1, 407–424. 10.1090/S0002-9947-1993-1097163-5Search in Google Scholar

[7] S. Caenepeel, S. Dăscălescu, G. Militaru and F. Panaite, Coalgebra deformations of bialgebras by Harrison cocycles, copairings of Hopf algebras and double crosscoproducts, Bull. Belg. Math. Soc. Simon Stevin 4 (1997), no. 5, 647–671. 10.36045/bbms/1105737769Search in Google Scholar

[8] S. Caenepeel, B. Ion and G. Militaru, The structure of Frobenius algebras and separable algebras, K-Theory 19 (2000), no. 4, 365–402. 10.1023/A:1007849203555Search in Google Scholar

[9] S. Caenepeel, G. Militaru and S. Zhu, Doi-Hopf modules, Yetter–Drinfel’d modules and Frobenius type properties, Trans. Amer. Math. Soc. 349 (1997), no. 11, 4311–4342. 10.1090/S0002-9947-97-02004-7Search in Google Scholar

[10] S. Caenepeel, G. Militaru and S. Zhu, Frobenius and Separable Functors for Generalized Module Categories and Nonlinear Equations, Lecture Notes in Math. 1787, Springer, Berlin, 2002. 10.1007/b83849Search in Google Scholar

[11] S. Dăscălescu, C. Năstăsescu and Ş. Raianu, Hopf Algebras. An Introduction, Monogr. Textb. Pure Appl. Math. 235, Marcel Dekker, New York, 2001. Search in Google Scholar

[12] D. Fischman, S. Montgomery and H.-J. Schneider, Frobenius extensions of subalgebras of Hopf algebras, Trans. Amer. Math. Soc. 349 (1997), no. 12, 4857–4895. 10.1090/S0002-9947-97-01814-XSearch in Google Scholar

[13] U. Krähmer and F. Wagemann, Racks, Leibniz algebras and Yetter–Drinfel’d modules, Georgian Math. J. 22 (2015), no. 4, 529–542. 10.1515/gmj-2015-0049Search in Google Scholar

[14] B. I.-P. Lin, Semiperfect coalgebras, J. Algebra 49 (1977), no. 2, 357–373. 10.1016/0021-8693(77)90246-0Search in Google Scholar

[15] A. Masuoka and Y. Doi, Generalization of cleft comodule algebras, Comm. Algebra 20 (1992), no. 12, 3703–3721. 10.1080/00927879208824536Search in Google Scholar

[16] G. Militaru, The Long dimodules category and nonlinear equations, Algebr. Represent. Theory 2 (1999), no. 2, 177–200. 10.1023/A:1009905324871Search in Google Scholar

[17] S. Montgomery, Hopf Algebras and Their Actions on Rings, CBMS Reg. Conf. Ser. Math. 82, American Mathematical Society, Providence, 1993. 10.1090/cbms/082Search in Google Scholar

[18] A. Nakajima, On generalized Harrison cohomology and Galois object, Math. J. Okayama Univ. 17 (1975), no. 2, 135–148. Search in Google Scholar

[19] M. E. Sweedler, Hopf Algebras, Math. Lect. Note Ser., W. A. Benjamin, New York, 1969. 10.1007/BFb0101433Search in Google Scholar

[20] L. Y. Zhang, Long bialgebras, dimodule algebras and quantum Yang–Baxter modules over Long bialgebras, Acta Math. Sin. (Engl. Ser.) 22 (2006), no. 4, 1261–1270. 10.1007/s10114-005-0683-5Search in Google Scholar

Received: 2015-05-29
Revised: 2015-12-12
Accepted: 2016-04-19
Published Online: 2017-08-15
Published in Print: 2019-09-01

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