We study the cohomology ring of the configuration space of unordered points in the two-dimensional torus. In particular, we compute the mixed Hodge structure on the cohomology, the action of the mapping class group, the structure of the cohomology ring and we prove the formality over the rationals.
Keywords: configuration space, cohomology ring, elliptic curve, torus, representation theory
Pagaria, Roberto  1
@article{AGT_2020_20_6_a6,
author = {Pagaria, Roberto},
title = {The cohomology rings of the unordered configuration spaces of elliptic curves},
journal = {Algebraic and Geometric Topology},
pages = {2995--3012},
year = {2020},
volume = {20},
number = {6},
url = {http://geodesic.mathdoc.fr/item/AGT_2020_20_6_a6/}
}
Pagaria, Roberto. The cohomology rings of the unordered configuration spaces of elliptic curves. Algebraic and Geometric Topology, Tome 20 (2020) no. 6, pp. 2995-3012. http://geodesic.mathdoc.fr/item/AGT_2020_20_6_a6/
[1] , The cohomology ring of the colored braid group, Mat. Zametki 5 (1969) 227
[2] , Certain topological invariants of algebraic functions, Tr. Mosk. Mat. Obs. 21 (1970) 27
[3] , , , Representation theory for the Križ model, Algebr. Geom. Topol. 14 (2014) 57 | DOI
[4] , Cohomology groups of configuration spaces of Riemann surfaces, Bull. Math. Soc. Sci. Math. Roumanie 58(106) (2015) 33
[5] , Cohomology of the toric arrangement associated with An, J. Fixed Point Theory Appl. 21 (2019) | DOI
[6] , Cohomology of abelian arrangements, Proc. Amer. Math. Soc. 144 (2016) 3093 | DOI
[7] , , Rational cohomology of configuration spaces of surfaces, from: "Algebraic topology and transformation groups" (editor T tom Dieck), Lecture Notes in Math. 1361, Springer (1988) 7 | DOI
[8] , , , On the homology of configuration spaces, Topology 28 (1989) 111 | DOI
[9] , , , , , Orlik–Solomon type presentations for the cohomology algebra of toric arrangements, Trans. Amer. Math. Soc. 373 (2020) 1909 | DOI
[10] , , Cohomology theory of Lie groups and Lie algebras, Trans. Amer. Math. Soc. 63 (1948) 85 | DOI
[11] , , , The homology of iterated loop spaces, 533, Springer (1976) | DOI
[12] , Poids dans la cohomologie des variétés algébriques, from: "Proceedings of the International Congress of Mathematicians, I" (editor R D James), Canad. Math. Congress (1975) 79
[13] , , Betti numbers of configuration spaces of surfaces, J. Lond. Math. Soc. 96 (2017) 367 | DOI
[14] , The Orlik–Solomon model for hypersurface arrangements, Ann. Inst. Fourier (Grenoble) 65 (2015) 2507 | DOI
[15] , , A primer on mapping class groups, 49, Princeton Univ. Press (2012)
[16] , , The cohomology algebra of unordered configuration spaces, J. Lond. Math. Soc. 72 (2005) 525 | DOI
[17] , , Representation theory: a first course, 129, Springer (1991) | DOI
[18] , , Symmetry, representations, and invariants, 255, Springer (2009) | DOI
[19] , , Stratified Morse theory, 14, Springer (1988) | DOI
[20] , Lie groups, Lie algebras, and representations : an elementary introduction, 222, Springer (2003) | DOI
[21] , The Lambrechts–Stanley model of configuration spaces, Invent. Math. 216 (2019) 1 | DOI
[22] , Betti numbers and stability for configuration spaces via factorization homology, Algebr. Geom. Topol. 17 (2017) 3137 | DOI
[23] , On the rational homotopy type of configuration spaces, Ann. of Math. 139 (1994) 227 | DOI
[24] , Computing cohomology of configuration spaces, preprint (2016)
[25] , Algebraic groups: the theory of group schemes of finite type over a field, 170, Cambridge Univ. Press (2017) | DOI
[26] , On the cohomology of configuration spaces on surfaces, J. Lond. Math. Soc. 68 (2003) 477 | DOI
[27] , Two examples of toric arrangements, J. Combin. Theory Ser. A 167 (2019) 389 | DOI
[28] , Configuration spaces on the sphere and higher loop spaces, Math. Z. 248 (2004) 527 | DOI
[29] , Betti numbers of unordered configuration spaces of the torus, preprint (2016)
[30] , Configuration spaces of algebraic varieties, Topology 35 (1996) 1057 | DOI
[31] , Hodge theory and complex algebraic geometry, I, 76, Cambridge Univ. Press (2007) | DOI
[32] , On the braid groups for RP2, J. Pure Appl. Algebra 166 (2002) 203 | DOI