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Orderly congruences bound local p-power exponents

Proved
HorizontalPadicL.SeededHorizontalPrimeSystemV2.orderExponent_le_exponent

by davidloeffler · Sep 22, 2026 · Mathlib 0df444a (Lean v4.33.1)

dirichlet-charactersnumber-theoryp-adic-l-functions

Congruence modulo p^m implies that the maximal local p-power quotient has exponent at least m.

Preamble
import Definitions.Def_KN_PrimePowerPropagation

set_option autoImplicit false
noncomputable section
open scoped BigOperators
Formal statement
namespace HorizontalPadicL

/-- Congruence modulo p^m implies that the maximal local p-power quotient
has exponent at least m. -/
theorem SeededHorizontalPrimeSystemV2.orderExponent_le_exponent
    {N k p B : ℕ} {ι : MTT.Qbar →+* ℂ} [Fact p.Prime]
    {ιp : MTT.Qbar →+* ℂ_[p]} {f : MTT.Eigenform N k ι}
    {η : DirichletCharacterWithLevel}
    (L : SeededHorizontalPrimeSystemV2 p ιp f η B) :
    ∀ n, L.orderExponent ≤ L.exponent n := by
  sorry

end HorizontalPadicL
Source
Kriz--Nordentoft, Horizontal p-adic L-functions, https://arxiv.org/pdf/2310.20678, Section 2.3.3, Lemma 5.7, Theorem 5.9 and Corollary 5.10.

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