Resultats globals: 4 registres trobats en 0.02 segons.
Articles, 4 registres trobats
Articles 4 registres trobats  
1.
29 p, 497.6 KB Non-existence of integral Hopf orders for twists of several simple groups of Lie type / Carnovale, Giovanna (Università degli Studi di Padova. Dipartimento di Matematica Tullio Levi-Civita) ; Cuadra, Juan (Universidad de Almería. Departamento de Matemáticas) ; Masut, Elisabetta (Università degli Studi di Padova. Dipartimento di Matematica Tullio Levi-Civita)
Let p be a prime number and q = pm, with m ≥ 1 if p 6= 2, 3 and m > 1 otherwise. Let Ω be any non-trivial twist for the complex group algebra of PSL2(q) arising from a 2-cocycle on an abelian subgroup of PSL2(q). [...]
2024 - 10.5565/PUBLMAT6812404
Publicacions matemàtiques, Vol. 68 Núm. 1 (2024) , p. 73-101 (Articles)  
2.
21 p, 388.1 KB Computation of Hopf Galois structures on low degree separable extensions and classification of those for degrees p2 and 2p / Crespo Vicente, Teresa (Universitat de Barcelona. Departament de Matemàtiques i Informàtica) ; Salguero García, Marta (Universitat de Barcelona. Departament de Matemàtiques i Informàtica)
A Hopf Galois structure on a finite field extension L/K is a pair (H,µ), where H is a finite cocommutative K-Hopf algebra and µ a Hopf action. In this paper we present a program written in the computational algebra system Magma which gives all Hopf Galois structures on separable field extensions of degree up to eleven and several properties of those. [...]
2020 - 10.5565/PUBLMAT6412005
Publicacions matemàtiques, Vol. 64 Núm. 1 (2020) , p. 121-141  
3.
30 p, 400.6 KB Cohomological dimensions of universal cosovereign Hopf algebras / Bichon, Julien (Université Clermont Auvergne. Laboratoire de Mathématiques Blaise Pascal)
We compute the Hochschild and Gerstenhaber-Schack cohomological dimensions of the universal cosovereign Hopf algebras, when the matrix of parameters is a generic asymmetry. Our main tools are considerations on the cohomologies of free product of Hopf algebras, and on the invariance of the cohomological dimensions under graded twisting by a finite abelian group.
2018 - 10.5565/PUBLMAT6221801
Publicacions matemàtiques, Vol. 62 Núm. 2 (2018) , p. 301-330 (Articles)  
4.
14 p, 316.3 KB On the Galois correspondence theorem in separable Hopf Galois theory / Crespo Vicente, Teresa (Universitat de Barcelona. Departament d'Algebra i Geometria) ; Rio Doval, Anna (Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada II) ; Vela del Olmo, María Montserrat (Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada II)
In this paper we present a reformulation of the Galois correspondence theorem of Hopf Galois theory in terms of groups carrying farther the description of Greither and Pareigis. We prove that the class of Hopf Galois extensions for which the Galois correspondence is bijective is larger than the class of almost classically Galois extensions but not equal to the whole class. [...]
2016 - 10.5565/PUBLMAT_60116_08
Publicacions matemàtiques, Vol. 60 Núm. 1 (2016) , p. 221-234 (Survey)  

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