ModularForm.discriminant_qExpansion_order

(UpperHalfPlane.qExpansion 1 ModularForm.discriminant).order = 1

The order of the q-expansion of the modular discriminant is 1: the zeroth coefficient vanishes (Δ is a cusp form) and the first coefficient equals 1.

Defined in: Mathlib.NumberTheory.ModularForms.LevelOne.DimensionFormula
Cited by: 1 results in Mathlib
Foundations: Depth 327 from the axioms · uses propext, Classical.choice, Quot.sound

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