On ELSV-type formulae and relations between $Ω$-integrals via deformations of spectral curves

The general relation between Chekhov-Eynard-Orantin topological recursion and the intersection theory on the moduli space of curves, the deformation techniques in topological recursion, and the polynomiality properties with respect to deformation parameters can be combined to derive vanishing relations involving intersection indices of tautological classes. We apply this strategy to three different families of spectral curves and show they give vanishing relations for integrals involving $Ω$-classes. The first class of vanishing relations are genus-independent and generalises the vanishings found by Johnson-Pandharipande-Tseng, and by the authors jointly with Do and Moskovsky. The two other classes of vanishing relations are of a different nature and depend on the genus.