tangent subvar XF7FYFMX
tangent subvar
Proposition 4.7. Let FW be a toric foliation on a complete Q-factorial toric variety XΣ of dimension n with W 6= NC. Then for any cone τ ∈ Σ, Vτ is tangent to F if and only if W + Cτ = NC. (pdf) (Chang 和 Chen, 2023, p. 25)