tangent curve YZJE5YA5

tangent curve

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Lemma 3.3. Let ω be a codimension 1 cone in a simplicial fan Σ. Denote by Vω the vector space generated by the rays of ω. Then the torus invariant curve Dω is not tangent to the foliation FV if and only if V ⊂ Vω. (pdf) (Wang, 2023, p. 81)