Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Wilhelm Plesken"'
Autor:
Wilhelm Plesken
Publikováno v:
Ternary Quadratic Forms and Norms
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff5327fee4187302aa24a85424d0bdb0
https://doi.org/10.1201/9781003071808-2
https://doi.org/10.1201/9781003071808-2
Autor:
Wilhelm Plesken, Thomas Bächler
Publikováno v:
Documenta Mathematica. 19:285-312
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3eb3498ca72ab0a7ad1867f343aa4119
https://doi.org/10.4171/dm/447
https://doi.org/10.4171/dm/447
Autor:
Wilhelm Plesken, Sebastian Jambor
Publikováno v:
Journal of Algebra. 358:250-256
This paper develops methods to describe the conjugacy classes of GL(n,R) on Rn×n for a serial ring R of length two. The main result is a reduction to a computation in the matrix algebra over the residue class field of R, which in some cases can be d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d21f458c46626e3ee4de3ba2be363fb3
https://doi.org/10.1016/j.jalgebra.2012.01.028
https://doi.org/10.1016/j.jalgebra.2012.01.028
Autor:
Wilhelm Plesken, Daniel Robertz
Publikováno v:
Mathematics in Computer Science. 4:231-242
This paper provides methods to decide whether a given analytic function of several complex variables is a linear combination of finitely many given analytic functions with coefficients of the following special form: Each one of these coefficients is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19c92b7d93cdaa382172c5472760cf7c
https://doi.org/10.1007/s11786-010-0053-2
https://doi.org/10.1007/s11786-010-0053-2
Autor:
Wilhelm Plesken, Daniel Robertz
Publikováno v:
Archiv der Mathematik. 93:445-449
The paper remarks on the average number of cycles of the elements of a finite permutation group in general and computes this number for the alternating groups and wreath products using the cycle number indicator.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47e9241e6f3c32f128e8a6cd357f8861
https://doi.org/10.1007/s00013-009-0045-0
https://doi.org/10.1007/s00013-009-0045-0
Autor:
Wilhelm Plesken, A. Fabiańska
Publikováno v:
Journal of Algebra. 322:914-935
The paper develops algorithmic methods to enumerate all normal subgroups of a finitely presented group such that the factor groups are either isomorphic to PSL ( 2 , p n ) or to PGL ( 2 , p n ) . The case of two generators is treated in detail. A ran
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ac90f5f9d9af361ce331329e27e3644
https://doi.org/10.1016/j.jalgebra.2009.03.026
https://doi.org/10.1016/j.jalgebra.2009.03.026
Autor:
Wilhelm Plesken
Publikováno v:
Archiv der Mathematik. 92:111-118
Both the Gauss-Bruhat decomposition and the LU-decomposition of the general linear group over a field are examples of a Thomas decomposition of systems of polynomial equations and inequations into disjoint triangular systems, a recently rediscovered
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cc649030d82f35fa48dca1e9ce729f4
https://doi.org/10.1007/s00013-008-2786-6
https://doi.org/10.1007/s00013-008-2786-6
Autor:
Wilhelm Plesken
Publikováno v:
Archiv der Mathematik. 92:44-56
The paper introduces a new polynomial to count the solutions of a system of polynomial equations and inequations over an algebraically closed field of characteristic zero based on the triangular decomposition algorithm by J. M. Thomas of the nineteen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97444def9f73e3c014daa7f83d5195ee
https://doi.org/10.1007/s00013-008-2785-7
https://doi.org/10.1007/s00013-008-2785-7
Autor:
Daniel Robertz, Wilhelm Plesken
Publikováno v:
Experiment. Math. 17, iss. 4 (2008), 499-510
Computing the relations for the coefficients satisfied by the characteristic polynomial of the Kronecker product of a general $n \times n$ matrix by a general $m \times m$ matrix leads to an elimination problem that is already difficult for small val
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::375e9768cd098292e936deea5559648c
https://doi.org/10.1080/10586458.2008.10128874
https://doi.org/10.1080/10586458.2008.10128874
Autor:
Wilhelm Plesken, Daniel Robertz
Publikováno v:
Journal of Algebra. 300:223-247
Characteristic zero representations of the ( 2 , 3 , 7 ) -triangle group in degrees up to seven are constructed by using Janet's algorithm for solving polynomial equations. These are used to find families of Hurwitz groups, i.e. finite epimorphic ima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f53ad1c136d78f760f3c419d14fe62c9
https://doi.org/10.1016/j.jalgebra.2006.02.021
https://doi.org/10.1016/j.jalgebra.2006.02.021