Geodesic
On representation varieties of free abelian groups
Informatics and Automation, Algebra, geometry, and number theory, Tome 292 (2016), pp. 255-263.

Voir la notice de l'article provenant de la source Math-Net.Ru

The reducibility of the representation variety of a free abelian group of finite rank in a semisimple non-simply connected algebraic group is proved. Irreducible components of the representation variety of a free abelian group of rank $2$ in groups of type $A_n$ are described. 
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A. A. Sharomet. On representation varieties of free abelian groups. Informatics and Automation, Algebra, geometry, and number theory, Tome 292 (2016), pp. 255-263. http://geodesic.mathdoc.fr/item/TRSPY_2016_292_a14/

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