Inversion of adjunction conjecture for foliations
Let be a normal variety, let be a foliation on , let be a prime divisor on and let be a -divisor such that and such that is -Cartier. Let be the normalisation and define foliation adjunction by
If is log canonical, then is log canonical in a neighbourhood of .
Inversion of adjunction. Log canonicity of the induced foliated pair on the normalisation of should imply log canonicity of the original foliated pair near .
This conjecture is closely related to the deformation conjecture for semi-log canonical foliation singularities and is motivated by inversion of adjunction in the birational study of pairs. The source presents it as an open conjecture.
References
Primary source
Calum Spicer, Roberto Svaldi and Sebastian Velazquez, “On moduli of foliated surfaces”, arXiv:2511.13491 (2025).
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