Canonical decomposition of a difference of convex sets
Algebraic Combinatorics, Tome 2 (2019) no. 4, pp. 585-602.

Let N be a lattice of rank n and let M=N be its dual lattice. In this article we show that given two closed, bounded, full-dimensional convex sets K 1 K 2 M :=M , there is a canonical convex decomposition of the difference K 2 int(K 1 ) and we interpret the volume of the pieces geometrically in terms of intersection numbers of toric b-divisors.

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DOI : 10.5802/alco.55
Classification : 52A22, 14M25, 14C17
Mots clés : convex geometry, toric geometry, intersection theory
Botero, Ana M. 1

1 University of Regensburg Dept. of mathematics Universitätsstr. 31 93053 Regensburg, Germany
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Botero, Ana M. Canonical decomposition of a difference of convex sets. Algebraic Combinatorics, Tome 2 (2019) no. 4, pp. 585-602. doi : 10.5802/alco.55. http://www.numdam.org/articles/10.5802/alco.55/

[1] Botero, A. M. Intersection theory of b-divisors in toric varieties, J. Algebraic Geom. (2018) (Accepted) | MR

[2] Burgos Gil, J. I.; Philippon, P.; Sombra, M. Arithmetic geometry of toric varieties. Metrics, measures and heights, Astérisque, Société Mathématique de France, 2014 no. 360, vi+222 pages | MR | Zbl

[3] Cox, D.; Little, J. B.; Schenck, H. Toric Varieties, Graduate Studies in Mathematics, 124, Amer. Math. Soc., 2011 | MR | Zbl

[4] Fulton, W. Introduction to Toric Varieties, Princeton Univ. Press, 1993

[5] Goodman, J. E.; Pach, J. Cell decomposition of polytopes by bending, Israel J. Math., Volume 64 (1988) no. 2, pp. 129-138 | DOI | MR | Zbl

[6] Griffiths, P.; Harris, J. Principles of Algebraic Geometry, Bull. Amer. Math. Soc., Volume 2 (1980) no. 1, pp. 197-200 | MR

[7] Hiriart-Urruty, J. B.; Lemaréchal, C. Fundamentals of convex analysis, Grundlehren Text Editions, Springer, 2001 | DOI | Zbl

[8] Kaveh, K.; Khovanskii, A. G. Convex bodies and algebraic equations on affine varieties (2008) (https://arxiv.org/abs/0804.4095v1)

[9] Kaveh, K.; Khovanskii, A. G. Newton-Okounkov bodies, semigroups of integral points, graded algebras and intersection theory, Ann. of Math. (2), Volume 176 (2012) no. 2, pp. 925-978 | DOI | MR | Zbl

[10] Kaveh, K.; Khovanskii, A. G. Convex bodies and multiplicities of ideals, Proc. Steklov Inst. Math., Volume 286 (2014) no. 1, pp. 268-284 | DOI | MR | Zbl

[11] Lazarsfeld, R.; Mustaţă, M. Convex bodies associated to linear series, Ann. Sci. Éc. Norm. Supér. (4), Volume 42 (2009) no. 5, pp. 783-835 | DOI | MR | Zbl

[12] Okounkov, A. Brunn–Minkowski inequality for multiplicities, Invent. Math., Volume 125 (1996) no. 3, pp. 405-411 | DOI | MR | Zbl

[13] Okounkov, A. Why would multiplicities be log-concave?, The orbit method in geometry and physics (Marseille, 2000) (Progr. Math.), Volume 213, Birkhäuser, Boston, 2003, pp. 329-347 | DOI | MR | Zbl

[14] Rockafellar, R. T. Convex Analysis, Princeton Univ. Press, 1970 | DOI

[15] Schneider, R. Convex bodies: The Brunn–Minkowski theory, Encyclopedia Math. Appl., 44, Cambridge University Press, 1993 | MR | Zbl

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