Zobrazeno 1 - 10
of 558
pro vyhledávání: '"Préaux, Jean"'
Autor:
Préaux, Jean-Philippe
Publikováno v:
Topology, 45 (1), (2006), pp.171-208
We prove that fundamental groups of orientable (geometrizable) 3-manifolds have a solvable conjugacy problem.
Comment: 36 pages, 5 figures, written during 2003. Fully available on the journal webpage
Comment: 36 pages, 5 figures, written during 2003. Fully available on the journal webpage
Externí odkaz:
http://arxiv.org/abs/1308.2888
Publikováno v:
Communication in Algebra 2019
The notion of limit roots of a Coxeter group W was recently introduced (see arXiv:1112.5415 and arXiv:1303.6710): they are the accumulation points of directions of roots of a root system for W. In the case where the root system lives in a Lorentzian
Externí odkaz:
http://arxiv.org/abs/1305.0052
Autor:
Préaux, Jean-Philippe
We extend the APES ({\sl Amplitude and Phase Estimation}) method of spectral analysis to the case of non-quasi periodic signals like appears in OFDM.
Comment: 7 pages. Preprint 2009
Comment: 7 pages. Preprint 2009
Externí odkaz:
http://arxiv.org/abs/1202.4441
Autor:
Préaux, Jean-Philippe
We recall the history of the proof of Seifert fibre space conjecture, as well as it motivations and its several generalisations.
Comment: 15 pages. Preprint 2010
Comment: 15 pages. Preprint 2010
Externí odkaz:
http://arxiv.org/abs/1202.4142
Autor:
Préaux, Jean-Philippe
We prove that fundamental groups of non-orientable 3-manifolds have a solvable conjugacy problem, and construct an algorithm. Together with our earlier work on the conjugacy problem in groups on orientable geometrizable 3-manifolds, all $\pi_1$ of (g
Externí odkaz:
http://arxiv.org/abs/1202.4148
Autor:
Préaux, Jean-Philippe
Publikováno v:
Confluentes Mathematici, 5 no. 1 (2013), p.73-92
We characterize the group property of being with infinite conjugacy classes (or icc, i.e. infinite and of which all conjugacy classes except {1} are infinite) for groups which are defined by an extension of groups. We give characterizations for all d
Externí odkaz:
http://arxiv.org/abs/1201.4107
Publikováno v:
Journal of Topology & Analysis, 3 (4), (2011), pp. 451-489
We establish sufficient conditions for the C$^*$-simplicity of two classes of groups. The first class is that of groups acting on trees, such as amalgamated free products, HNN-extensions, and their normal subgroups; for example normal subgroups of Ba
Externí odkaz:
http://arxiv.org/abs/0909.3528
Autor:
Preaux, Jean-Philippe, Raout, Jacques
We give explicit formulas as well as a quadratic time algorithm to solve (so called) generalized Vandermonde's systems of p linear equations and n variables. It allows in particular to find all (so called Lagrange's) interpolation polynoms with degre
Externí odkaz:
http://arxiv.org/abs/0709.2153
Autor:
Preaux, Jean-Philippe
We characterize the group property of being with infinite conjugacy classes (or icc, i.e. in which all conjugacy classes beside 1 are infinite) for split extensions of groups.
Comment: 8 pages
Comment: 8 pages
Externí odkaz:
http://arxiv.org/abs/math/0703739
Autor:
Preaux, Jean-Philippe
We characterize the group property of being with infinite conjugacy classes (or icc, in which all conjugacy classes beside 1 are infinite) for extensions of some specific groups ; namely extensions of abelian, centerless, icc, or word hyperbolic grou
Externí odkaz:
http://arxiv.org/abs/math/0703740