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math.AG2021
On quadratically enriched excess and residual intersections
Tom Bachmann, Kirsten Wickelgren
We use recent duality results of Eisenbud--Ulrich to give tools to study quadratically enriched residual intersections when there is no excess bundle. We use this to prove a formul…
math.AC2021
An explicit self-duality
Nikolas Kuhn, Devlin Mallory, Vaidehee Thatte +1
We provide an exposition of the canonical self-duality associated to a presentation of a finite, flat, complete intersection over a Noetherian ring, following work of Scheja and St…