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Showing 2008 · math.COShow all
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math.CO2008
Combinatorics and geometry of power ideals
Federico Ardila, Alexander Postnikov
We investigate ideals in a polynomial ring which are generated by powers of linear forms. Such ideals are closely related to the theories of fat point ideals, Cox rings, and box sp…
math.CO2008
Discrete piecewise linear functions
Sergei Ovchinnikov
The concept of permutograph is introduced and properties of integral functions on permutographs are established. The central result characterizes the class of integral functions th…