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Sur les Groupes Hyperboliques d'apres Mikhael Gromov (Paperback): Etienne Ghys, Pierre da la Harpe Sur les Groupes Hyperboliques d'apres Mikhael Gromov (Paperback)
Etienne Ghys, Pierre da la Harpe
R3,236 Discovery Miles 32 360 Ships in 10 - 15 working days

- Qa faut avouer, dit Trouscaillon qui, dans cette simple ellipse, utilisait hyperboliquement Ie cercle vicieux de la parabole. - Bun, dit Ie Sanctimontronais, j'y vais. (R. Queneau, Zazie dans Ie metru, Chapitre X.) L'etude des groupes infinis a toujours ete en relation etroite avec des considerations geometriques: etude des deplacements de l'espace euclidien R3 (Jordan, 1868), programme d'Erlangen (Klein, 1872), travaux de Lie et Poincare. L'approche combinatoire des groupes, fondee sur la notion de presentation, remonte a Dyck (1882) mais doit son developpement en premier lieu a Dehn (des 1910) (voir ChM]). Les resultats decisifs de Dehn sur les groupes fondamentaux des sur faces sont marques par un ingredient geometrique crucial qui est la couTbuTe negati.ve. C'est ce me-me ingredient qui est ala base du tra vail fondamental de Gromov sur les groupes hyperboliques, conune on Ie voit esquisse dans Gr2, Gr4] et repris dans Gr5]. Nous sonuues cOllvaincus que l'importance de ce travail dans Ie developpement. de la theorie des groupes est comparable it ceux deja cites de Klein et Dehll."

Geometry and Dynamics (Paperback, illustrated Edition): James Eells, Etienne Ghys, Mikhail Lyubich, Jacob Pallis, Jose Seade Geometry and Dynamics (Paperback, illustrated Edition)
James Eells, Etienne Ghys, Mikhail Lyubich, Jacob Pallis, Jose Seade
R3,257 Discovery Miles 32 570 Ships in 12 - 17 working days

This volume is based on talks given at the Conference in Honor of the 60th Anniversary of Alberto Verjovsky, a prominent mathematician in Latin America who made significant contributions to dynamical systems, geometry, and topology. Articles in the book present recent work in these areas and are suitable for graduate students and research mathematicians.

Le jardin des courbes - Dictionnaire raisonne des courbes planes celebres et remarquables (French, Paperback): Etienne Ghys Le jardin des courbes - Dictionnaire raisonne des courbes planes celebres et remarquables (French, Paperback)
Etienne Ghys; Hamza Khelif
R1,203 Discovery Miles 12 030 Ships in 10 - 15 working days
Group Theory From A Geometrical Viewpoint (Paperback): Alberto Verjovski, Etienne Ghys, Andre Haefliger Group Theory From A Geometrical Viewpoint (Paperback)
Alberto Verjovski, Etienne Ghys, Andre Haefliger
R2,731 Discovery Miles 27 310 Ships in 10 - 15 working days

This proceedings presents the latest research materials done on group theory from geometrical viewpoint in particular Gromov's theory of hyperbolic groups, Coxeter groups, Tits buildings and actions on real trees. All these are very active subjects.

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