Research-Stack/0-Core-Formalism/lean/Semantics/Semantics/ProjectableGeometryCanonical.lean
2026-05-11 22:14:31 -05:00

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import Mathlib.Data.Nat.Basic
namespace Semantics.ProjectableGeometryCanonical
/-!
# Projectable Geometry Canonical Representation
This module records the current canonical representation for the projectable
geometry compressor:
* signed 16-axis envelope,
* 12D source/residual plane,
* 4D primitive keel,
* genus-3 residual boat,
* 0D closure witness.
It is an accounting gate for reversible compression representations, not a
physics claim.
-/
/-- The canonical dimensional axis counts for the current representation. -/
def signedEnvelopeAxes : Nat := 16
def sourcePlaneAxes : Nat := 12
def primitiveKeelAxes : Nat := 4
def genusHandles : Nat := 3
def closurePointAxes : Nat := 0
/--
The decision-diagram shell mass is represented in twelfths to avoid Float or
open-ended rational parsing in the core.
-/
structure DimensionalShell where
visible4d : Nat
shadow3d : Nat
closure0d : Nat
lawbound : Nat
unresolved : Nat
total : Nat
deriving Repr, DecidableEq
/-- Canonical dimensional shell: 4/12 visible, 3/12 shadow, 1/12 closure, 4/12 lawbound. -/
def canonicalShell : DimensionalShell :=
{ visible4d := 4
shadow3d := 3
closure0d := 1
lawbound := 4
unresolved := 0
total := 12 }
/-- The shell closes when all named mass accounts sum to the declared total with no unresolved debt. -/
def shellCloses (s : DimensionalShell) : Bool :=
s.visible4d + s.shadow3d + s.closure0d + s.lawbound + s.unresolved == s.total &&
s.unresolved == 0
/-- Three-handle genus-3 carrier for a 12D residual lane. -/
structure Genus3ResidualBoat where
packetLocal : Nat
shearTorsion : Nat
spectralField : Nat
residual12d : Nat
deriving Repr, DecidableEq
/-- The residual boat closes when its three handles exactly reconstruct the residual lane. -/
def residualBoatCloses (boat : Genus3ResidualBoat) : Bool :=
boat.packetLocal + boat.shearTorsion + boat.spectralField == boat.residual12d
/-- Canonical projectable geometry representation packet. -/
structure CanonicalProjectableRep where
signedAxes : Nat
sourceAxes : Nat
primitiveAxes : Nat
genusHandleCount : Nat
closureAxes : Nat
source12dMass : Nat
lifted4dMass : Nat
residual12dMass : Nat
shell : DimensionalShell
boat : Genus3ResidualBoat
sourceHashPresent : Bool
receiptHashPresent : Bool
deriving Repr, DecidableEq
/-- Source rehydration law: lifted 4D projection plus residual lane equals source mass. -/
def sourceRehydrates (rep : CanonicalProjectableRep) : Bool :=
rep.lifted4dMass + rep.residual12dMass == rep.source12dMass
/-- Axis counts match the 16D -> 12D -> 4D -> genus-3 -> 0D canonical representation. -/
def axesCanonical (rep : CanonicalProjectableRep) : Bool :=
rep.signedAxes == signedEnvelopeAxes &&
rep.sourceAxes == sourcePlaneAxes &&
rep.primitiveAxes == primitiveKeelAxes &&
rep.genusHandleCount == genusHandles &&
rep.closureAxes == closurePointAxes
/-- Full promotion gate for the canonical representation. -/
def canonicalRepAdmissible (rep : CanonicalProjectableRep) : Bool :=
axesCanonical rep &&
shellCloses rep.shell &&
residualBoatCloses rep.boat &&
sourceRehydrates rep &&
rep.boat.residual12d == rep.residual12dMass &&
rep.sourceHashPresent &&
rep.receiptHashPresent
/-- A small closed witness: source mass 12, lifted mass 7, residual mass 5. -/
def sampleClosedRep : CanonicalProjectableRep :=
{ signedAxes := 16
sourceAxes := 12
primitiveAxes := 4
genusHandleCount := 3
closureAxes := 0
source12dMass := 12
lifted4dMass := 7
residual12dMass := 5
shell := canonicalShell
boat := { packetLocal := 2, shearTorsion := 2, spectralField := 1, residual12d := 5 }
sourceHashPresent := true
receiptHashPresent := true }
/-- Negative witness: residual handles do not reconstruct the 12D residual lane. -/
def brokenResidualRep : CanonicalProjectableRep :=
{ sampleClosedRep with
boat := { packetLocal := 2, shearTorsion := 2, spectralField := 0, residual12d := 5 } }
/-- Negative witness: an unresolved shell debt prevents closure. -/
def unresolvedShellRep : CanonicalProjectableRep :=
{ sampleClosedRep with
shell := { canonicalShell with unresolved := 1, total := 13 } }
theorem canonicalShellCloses : shellCloses canonicalShell = true := by
rfl
theorem sampleClosedRepAdmissible : canonicalRepAdmissible sampleClosedRep = true := by
rfl
theorem brokenResidualRepNotAdmissible : canonicalRepAdmissible brokenResidualRep = false := by
rfl
theorem unresolvedShellRepNotAdmissible : canonicalRepAdmissible unresolvedShellRep = false := by
rfl
#eval canonicalRepAdmissible sampleClosedRep
#eval canonicalRepAdmissible brokenResidualRep
#eval canonicalRepAdmissible unresolvedShellRep
end Semantics.ProjectableGeometryCanonical