A criterion for nonnegative coefficients in counting polynomials for poset extensions is used to prove multivariate Ehrhart positivity for marked order polytopes of skew shapes.
Geom., 1 (1986), pp
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Ehrhart positivity for marked order polytopes
A criterion for nonnegative coefficients in counting polynomials for poset extensions is used to prove multivariate Ehrhart positivity for marked order polytopes of skew shapes.