Comptes Rendus
Group theory
On the generation of discrete and topological Kac–Moody groups
[Sur les générateurs des groupes de Kac–Moody topologiques et discrets]
Comptes Rendus. Mathématique, Volume 353 (2015) no. 8, pp. 695-699.

On montre que les groupes de Kac–Moody topologiques ou discrets définis sur des corps finis sont 2-engendrés dans de nombreux cas. On exhibe ensuite des bornes explicites sur le nombre minimal de générateurs pour un groupe de Kac–Moody arbitraire.

This article shows that discrete or topological Kac–Moody groups defined over finite fields are in many cases 2-generated. We provide explicit bounds on the minimal number of generators for arbitrary Kac–Moody groups.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crma.2015.03.009
Inna Capdeboscq 1

1 Mathematics Institute, University of Warwick, Coventry, CV4 7AL, UK
@article{CRMATH_2015__353_8_695_0,
     author = {Inna Capdeboscq},
     title = {On the generation of discrete and topological {Kac{\textendash}Moody} groups},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {695--699},
     publisher = {Elsevier},
     volume = {353},
     number = {8},
     year = {2015},
     doi = {10.1016/j.crma.2015.03.009},
     language = {en},
}
TY  - JOUR
AU  - Inna Capdeboscq
TI  - On the generation of discrete and topological Kac–Moody groups
JO  - Comptes Rendus. Mathématique
PY  - 2015
SP  - 695
EP  - 699
VL  - 353
IS  - 8
PB  - Elsevier
DO  - 10.1016/j.crma.2015.03.009
LA  - en
ID  - CRMATH_2015__353_8_695_0
ER  - 
%0 Journal Article
%A Inna Capdeboscq
%T On the generation of discrete and topological Kac–Moody groups
%J Comptes Rendus. Mathématique
%D 2015
%P 695-699
%V 353
%N 8
%I Elsevier
%R 10.1016/j.crma.2015.03.009
%G en
%F CRMATH_2015__353_8_695_0
Inna Capdeboscq. On the generation of discrete and topological Kac–Moody groups. Comptes Rendus. Mathématique, Volume 353 (2015) no. 8, pp. 695-699. doi : 10.1016/j.crma.2015.03.009. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2015.03.009/

[1] P. Abramenko; B. Muhlherr Presentations de certaines BN-paires jumeles comme sommes amalgames, C. R. Acad. Sci. Paris, Ser. I, Volume 325 (1997) no. 7, pp. 701-706

[2] M. Aschbacher; R. Guralnick Some applications of the first cohomology group, J. Algebra, Volume 90 (1984) no. 2, pp. 446-460

[3] H. Ben Messaoud Almost split real forms for hyperbolic Kac–Moody Lie algebras, J. Phys. A, Volume 39 (2006) no. 44, pp. 13659-13690

[4] I. Capdeboscq Bounded presentations of Kac–Moody groups, J. Group Theory, Volume 16 (2013) no. 6, pp. 899-905

[5] I. Capdeboscq; B. Rémy On some pro-p groups from infinite-dimensional Lie theory, Math. Z., Volume 278 (2014) no. 1–2, pp. 39-54

[6] P.-E. Caprace; B. Rémy Simplicité abstraite des groupes de Kac–Moody non-affines, C. R. Acad. Sci. Paris, Ser. I, Volume 342 (2006) no. 8, pp. 539-544

[7] L. Carbone; S. Chung; L. Cobbs; R. McRae; D. Nandi; Y. Naqvi; D. Penta Classification of hyperbolic Dynkin diagrams, root lengths and Weyl group orbits, J. Phys. A, Volume 43 (2010) no. 15, p. 155209 ([30 p.])

[8] R. Carter Lie Algebras of Finite and Affine Type, Cambridge Studies in Advanced Mathematics, vol. 96, Cambridge University Press, Cambridge, UK, 2005

[9] R.W. Carter; Y. Chen Automorphisms of affine Kac–Moody groups and related Chevalley groups over rings, J. Algebra, Volume 155 (1993) no. 1, pp. 44-94

[10] D. Gorenstein; R. Lyons; R. Solomon The Classification of the Finite Simple Groups, Number 1, American Mathematical Society Surveys and Monographs, vol. 40, 1998 (#3)

[11] R. Guralnick; W. Kantor Probabilistic generation of finite simple groups. Special issue in honor of Helmut Wielandt, J. Algebra, Volume 234 (2000) no. 2, pp. 743-792

[12] J.-Y. Hee Construction de groupes tordus en théorie de Kac–Moody, C. R. Acad. Sci. Paris, Ser. I Math., Volume 310 (1990) no. 3, pp. 77-80

[13] W. Kantor; A. Lubotzky The probability of generating a finite classical group, Geom. Dedic., Volume 36 (1990) no. 1, pp. 67-87

[14] N. Menezes; M. Quick; C. Roney-Dougal The probability of generating a finite simple group, Isr. J. Math., Volume 198 (2013), pp. 371-392

[15] G. Rousseau Groupes de Kac–Moody déployés sur un corps local, II. Masures ordonnées, 2012 (preprint) | arXiv

[16] J. Tits Uniqueness and presentation of Kac–Moody groups over fields, J. Algebra, Volume 105 (1987), pp. 542-573

Cité par Sources :

Commentaires - Politique


Ces articles pourraient vous intéresser

The t-analog of the level one string function for twisted affine Kac–Moody algebras

Sachin S. Sharma; Sankaran Viswanath

C. R. Math (2012)


Réflexions dans un cristal

Pierre Baumann; Stéphane Gaussent; Joel Kamnitzer

C. R. Math (2012)


Diagrams for nonabelian Hodge spaces on the affine line

Philip Boalch; Daisuke Yamakawa

C. R. Math (2020)