chi F
By definition, the Euler characteristic of coherent sheaf $F$ on a variety $X$ is $\sum_i (-1)^i$ dim $HH^i (X, F)$. However, this methods uses the Hirzebruch-Riemann-Roch theorem to calculate the Euler characteristic.
For a nef line bundle on a normal toric variety, the Euler characteristic equals the number of lattice points in the corresponding polytope.
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The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/NormalToricVarieties/ChowDocumentation.m2:545:0.