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math.AG2021
The Scheme of Monogenic Generators I: Representability
Sarah Arpin, Sebastian Bozlee, Leo Herr +1
This is the first in a series of two papers that study monogenicity of number rings from a moduli-theoretic perspective. Given an extension of algebras , when is generated…
math.AG2021
Costello's pushforward formula: errata and generalization
Leo Herr, Jonathan Wise
K. Costello's Pushforward Formula is not correct as stated. We verify it holds under an assumption of properness or of a weaker notion we call "purity." We then check many papers t…