Zobrazeno 1 - 10
of 26
pro vyhledávání: '"J. J. Etayo"'
Publikováno v:
Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas. 112:633-640
Every finite group G acts on some non-orientable unbordered surfaces. The minimal topological genus of those surfaces is called the symmetric crosscap number of G. It is known that 3 is not the symmetric crosscap number of any group but it remains un
Publikováno v:
Moscow Mathematical Journal. 17:357-369
Autor:
J. J. Etayo, Beatriz Estrada
Publikováno v:
Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas. 110:457-481
A classical study about Klein and Riemann surfaces consists in determining their groups of automorphisms. This problem is very difficult in general,and it has been solved for particular families of surfaces or for fixed topological types. In this pap
Publikováno v:
Glasgow Mathematical Journal. 57:211-230
This paper is devoted to determine the connectedness of the branch loci of the moduli space of non-orientable unbordered Klein surfaces. We obtain a result similar to Nielsen's in order to determine topological conjugacy of automorphisms of prime ord
Autor:
E. Martínez, J. J. Etayo Gordejuela
Publikováno v:
Proceedings of the Royal Society of Edinburgh: Section A Mathematics. 138:1197-1213
Every finite group G acts as an automorphism group of some non-orientable Klein surfaces without boundary. The minimal genus of these surfaces is called the symmetric cross-cap number and denoted by $\tilde{\sigma}(G)$. This number is related to othe
Autor:
Emilio Bujalance, Colin Campbell, E. Martínez, J. J. Etayo, Edmund F. Robertson, F.J. Cirre, Martyn Quick, Colva M. Roney-Dougal, G. Gromadzki
Publikováno v:
Groups St Andrews 2013
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09854e29dbe79947417255b59856301c
https://doi.org/10.1017/cbo9781316227343.011
https://doi.org/10.1017/cbo9781316227343.011
Autor:
E. Martínez, J. J. Etayo Gordejuela
Publikováno v:
International Journal of Algebra and Computation. 16:91-98
In this work we give pairs of generators (x, y) for the alternating groups An, 5 ≤ n ≤ 19, such that they determine the minimal genus of a Riemann surface on which An acts as the automorphism group. Using these results we prove that A15 is the un
Autor:
E. Martínez, J. J. Etayo
Every finite group acts as an automorphism group of several bordered compact Klein surfaces. The minimal genus of these surfaces is called the real genus of and it is denoted The systematical study of this parameter was begun by May and continued by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3247af33449f5498234c23f4b4606d6e
https://eprints.ucm.es/id/eprint/24722/
https://eprints.ucm.es/id/eprint/24722/
Every finite group acts as a group of automorphisms of some compact bordered Klein surface of algebraic genus g≥2 . The same group G may act on different genera and so it is natural to look for the minimum genus on which G acts. This is the minimum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5bb84c9c787e862820e34662cf5ed260
https://doi.org/10.1017/cbo9780511842467.010
https://doi.org/10.1017/cbo9780511842467.010
Autor:
E. Martínez, J. J. Etayo
Publikováno v:
MATHEMATICA SCANDINAVICA. 95:226
We construct a special type of fundamental regions for any Fuchsian group $F$ generated by an even number of half-turns, and for certain non-Euclidean crystallographic groups (NEC groups in short). By comparing these regions we give geometrical condi