Module

RationalFunctionField_ord_ofHeightOneSpectrum_of_span.lean

Nyll.AlgebraicCurves.Places.Rational.RationalFunctionField_ord_ofHeightOneSpectrum_of_span
1 declaration indexed from sourceView source ↗

RationalFunctionField ord ofHeightOneSpectrum of span

Orders at a polynomial prime generated by an irreducible polynomial are computed from the corresponding adic valuation.

Declarations

AlgebraicCurve.RationalFunctionField.ord_ofHeightOneSpectrum_of_span
Source context 8 commands

Surrounding namespaces, section variables, and local commands at this declaration.

section ProofImplementation
namespace AlgebraicCurves.Places.Rational.Proofs
namespace RationalFunctionField_ord_ofHeightOneSpectrum_of_span
attribute [-instance]
  AlgebraicCurve.Place.instIsRankOneDiscreteWithZeroMultiplicativeIntAdicValuation
  AlgebraicCurve.Place.instIsTrivialOnWithZeroMultiplicativeIntAdicValuation
attribute [-simp] AlgebraicCurve.Place.congrEquiv_symm_apply
  AlgebraicCurve.RationalFunctionField.heightOneSpectrumOfIrreducible_asIdeal
  AlgebraicCurve.Place.congrRingEquiv_toValuationSubring AlgebraicCurve.Place.congrEquiv_apply
  AlgebraicCurve.Place.coe_comapSymmRingEquiv_apply
  AlgebraicCurve.RationalFunctionField.deg_placeOfPoint
open AlgebraicCurve
open IsDedekindDomain WithZero IsLocalRing
open scoped Polynomial
theorem _root_.AlgebraicCurve.RationalFunctionField.ord_ofHeightOneSpectrum_of_span {K : Type*}
  [Field K] (w : IsDedekindDomain.HeightOneSpectrum (Polynomial K)) {p : Polynomial K} (hp :
  p ≠ 0) (hw : w.asIdeal = Ideal.span {p}) : (Place.ofHeightOneSpectrum (K := K) (F :=
  RatFunc K) w).ord (algebraMap (Polynomial K) (RatFunc K) p) = 1