Frobenius identities for the volume map on Cohen-Macaulay rings give sufficient conditions for anisotropy and Hard Lefschetz in Gorenstein quotients and deduce the g-theorem for simplicial spheres plus the Ohsugi-Hibi conjecture.
Ogus, Lectures on Logarithmic Algebraic Geometry, Cambridge University Press, Cambridge
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The Donaldson-Friedman singular fibre is realized as a Ferrand pushout whose operational Chow ring is an equalizer, yielding specialization formulas and additive second Chern cycles plus polarized charges for Ward-Hartshorne-Serre bundles.
citing papers explorer
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Frobenius identities for the volume map on Cohen--Macaulay rings
Frobenius identities for the volume map on Cohen-Macaulay rings give sufficient conditions for anisotropy and Hard Lefschetz in Gorenstein quotients and deduce the g-theorem for simplicial spheres plus the Ohsugi-Hibi conjecture.
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Geometry of the Donaldson-Friedman Pushout: Twistor degenerations and instanton charge
The Donaldson-Friedman singular fibre is realized as a Ferrand pushout whose operational Chow ring is an equalizer, yielding specialization formulas and additive second Chern cycles plus polarized charges for Ward-Hartshorne-Serre bundles.