Inversion of adjunction conjecture for foliations
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.
Sources & referencesView supporting material
Primary source
Calum Spicer, Roberto Svaldi and Sebastian Velazquez, “On moduli of foliated surfaces”, arXiv:2511.13491 (2025).
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