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def definition def or abbrev high

atmospheric_weight

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atmospheric_weight assigns the real value 1/2 as the base atmospheric mixing weight, encoding maximal parity mix for neutrino oscillations. Neutrino physicists deriving PMNS angles from cubic voxel constraints cite it when computing sin²θ23. The definition is a direct constant assignment with no further reduction.

claimThe atmospheric mixing weight is defined as $1/2$, the contribution from maximal parity mixing in the atmospheric sector.

background

The module formalizes cubic voxel topology constraints that force CKM and PMNS mixing parameters. atmospheric_weight supplies the leading term for the atmospheric sector before any radiative adjustment. It sits alongside sibling definitions such as solar_weight and reactor_weight that partition the mixing contributions by sector.

proof idea

Direct constant definition assigning the real number 1/2.

why it matters in Recognition Science

It supplies the base term in sin2_theta23_pred and is invoked by pmns_theta23_match to obtain agreement with the observed value 0.546 within 1 percent. The parent theorem atmospheric_angle_forced adds the radiative correction 6*alpha to recover the full prediction. This step implements the rung-ratio forcing of mixing angles within the Recognition framework.

scope and limits

Lean usage

example : atmospheric_weight = 1 / 2 := rfl

formal statement (Lean)

  57noncomputable def atmospheric_weight : ℝ := 1 / 2

proof body

Definition body.

  58
  59/-- The atmospheric radiative correction factor.
  60    Estimated as Faces * alpha. -/

used by (5)

From the project-wide theorem graph. These declarations reference this one in their body.

depends on (3)

Lean names referenced from this declaration's body.