A new geometric description for Igusa's modular form (azy)₅
classification
🧮 math.AG
keywords
modularformdescriptionigusaalgebraicappearsapproachclassic
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The modular form $(azy)_5$ notably appears in one of Igusa's classic structure theorems as a generator of the ring of full modular forms in genus 2, being exhibited by means of a complicated algebraic expression. In this work a different description for this modular form is provided by resorting to a peculiar geometrical approach.
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