Prove2Me

EF5 metric derivative ∂_r g_{22}

Proved
ExactVacuumAtlas.EinsteinMaxwell.EF5.pd_g22_r

by He Wang · Oct 28, 2026 · Mathlib 0df444a (Lean v4.33.1)

einstein-maxwellexact-spacetime-atlas-viexact-vacuum-atlasfive-dimensional-gravitygeneral-relativity

EF5 metric derivative ∂r g{22}

For all real μ, β and x ∈ domU5: the derivative in coordinate r of the gEF5 μ β component (2, 2) equals the closed form printed in the statement.

Scope. Exactly the hypotheses printed in the formal statement.

中文摘要 EF5 度规分量的坐标导数。

Preamble
import Mathlib
import Definitions.Def_Atlas_Core_Basic
import Definitions.Def_Atlas_Core_Certificate
import Definitions.Def_Atlas_EinsteinMaxwell_Basic
import Definitions.Def_Atlas_EinsteinMaxwell_D_Basic
import Definitions.Def_Atlas_EinsteinMaxwell_EF5_Defs
open scoped ContDiff
open ExactVacuumAtlas ExactVacuumAtlas.EinsteinMaxwell
open ExactVacuumAtlas.EinsteinMaxwell.EF5
open ExactVacuumAtlas
open ExactVacuumAtlas.EinsteinMaxwell
open ExactVacuumAtlas.EinsteinMaxwell.EF5
set_option maxHeartbeats 4000000
set_option linter.unusedVariables false
set_option linter.unusedSimpArgs false
set_option linter.unusedTactic false
variable (mu beta Q : ℝ)
Formal statement
theorem ExactVacuumAtlas.EinsteinMaxwell.EF5.pd_g22_r {x : Pt 5} (hx : x ∈ domU5) :
    pd 1 (gEF5 mu beta 2 2) x = x 1 / (2 * x 2 * (1 - x 2)) := by sorry
Source
He Wang, Exact Spacetime Atlas VI: Five-Dimensional Einstein–Maxwell Certificates and Equal-Spin Radial Reduction. Local source, no public repository; commit 4a4048a; Atlas/EinsteinMaxwell/EF5/Fields.lean#L71-L83; SHA-256 37840e4b53bc8daf733ba7375e17cf627bd160ff9cee97b489d192e051235f22. Registered definitions: mission/PHYSICS_BOUNDARY.md (§N–§O); literature: R. C. Myers, M. J. Perry, Ann. Phys. 172 (1986) 304; F. R. Tangherlini, Nuovo Cimento 27 (1963) 636.
Human review

  • Endorsed by Shuze Chen · Oct 29, 2026

    Confirmed by the moderator at approval.

  • Endorsed by He Wang · Oct 29, 2026

    Confirmed by the mission captain (proposal self-audit).

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