Mathematics – Metric Geometry
Scientific paper
2007-06-13
Albanian J. Math. 1 (2007), no. 4, 187--211
Mathematics
Metric Geometry
22 pages, 4 figures
Scientific paper
The notion of convexity in tropical geometry is closely related to notions of convexity in the theory of affine buildings. We explore this relationship from a combinatorial and computational perspective. Our results include a convex hull algorithm for the Bruhat--Tits building of SL$_d(K)$ and techniques for computing with apartments and membranes. While the original inspiration was the work of Dress and Terhalle in phylogenetics, and of Faltings, Kapranov, Keel and Tevelev in algebraic geometry, our tropical algorithms will also be applicable to problems in other fields of mathematics.
Joswig Michael
Sturmfels Bernd
Yu Josephine
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