On Minkowski decomposition of Okounkov bodies on a Del Pezzo surface

Patrycja Łuszcz-Świdecka

Abstract


We show that on a blow up of P2 in 3 general points there exists a finite set of nef divisors P1,...,Ps such that the Okounkov body Δ(D) of an arbitrary effective R-divisor D on X is the Minkowski sum
Δ(D)=∑i=1s aiΔ(Pi) (1)
with non-negative coefficients ai ∈ R≥0.

Keywords


Okounkov body; Del Pezzo surface; Minkowski sum

Mathematics Subject Classification


14C20, 14F05

References


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