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Josephine Yu

Publications and source records attributed to Josephine Yu.

39 records · Page 3Linked to original sources

Tropical polytopes and cellular resolutions

Tropical polytopes are images of polytopes in an affine space over the Puiseux series field under the degree map. This viewpoint gives rise to a family of cellular resolutions of monomial ideals which generalize the hull complex of Bayer and Sturmfels, instances of which improve upon the hull resolution in the sense of being smaller. We also suggest a new definition of a face of a tropical polytope, which has nicer properties than previous definitions; we give examples and provide many conjectures and directions for further research in this area.

math.CO

Tropical Convexity via Cellular Resolutions

The tropical convex hull of a finite set of points in tropical projective space has a natural structure of a cellular free resolution. Therefore, methods from computational commutative algebra can be used to compute tropical convex hulls. Tropical cyclic polytopes are also presented.

math.MG

Classification of Six-Point Metrics

There are 339 combinatorial types of generic metrics on six points. They correspond to the 339 regular triangulations of the second hypersimplex Δ(6,2), which also has 14 non-regular triangulations.

math.MG