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Geometry of the Donaldson-Friedman Pushout: Twistor degenerations and instanton charge

Altavilla, Amedeo et al.
arXiv (All) · Papers
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algebraic-geometryalgebraic-topologymathematical-physics
We study the Donaldson-Friedman semistable twistor degeneration by combining the scheme-theoretic geometry of its Ferrand pushout with the logarithmic topology of its Kato-Nakayama realisation. For the central fibre $ Z_0=\widetilde Z_1\cup_Q\widetilde Z_2,$ the Ferrand description yields an explici
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