Research-Stack/0-Core-Formalism/lean/Semantics/Semantics/MereotopologicalSheafHypergraph.lean

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/-
MereotopologicalSheafHypergraph.lean
Formalizes the intersection of Mereology (part-whole relations),
Topology (connectivity and closure), Sheaves (local-to-global consistency),
and Hypergraphs (multi-node relations) for the informatic manifold.
This module defines the "Constitutional Grammar" for node interactions
in the Sovereign Informatic Manifold.
-/
import Semantics.FixedPoint
namespace Semantics.MereotopologicalSheafHypergraph
open Semantics.Q16_16
-- ============================================================
-- 1. MEREOTOPOLOGY (Part-Whole + Connectivity)
-- ============================================================
/-- Part-Of Relation Axioms -/
structure Mereology where
partOf : Nat → Nat → Prop -- Node A is part of Node B
reflexive : ∀ a, partOf a a
transitive : ∀ a b c, partOf a b → partOf b c → partOf a c
antisymmetric : ∀ a b, partOf a b → partOf b a → a = b
/-- Connectivity on the Manifold -/
structure Topology where
connected : Nat → Nat → Prop
symmetric : ∀ a b, connected a b ↔ connected b a
irreflexive : ∀ a, ¬ connected a a
-- ============================================================
-- 2. HYPERGRAPH REWRITING
-- ============================================================
/-- A HyperEdge connects a set of nodes -/
structure HyperEdge where
nodes : List Nat
weight : Q16_16
label : String
/-- A HyperGraph is a set of nodes and hyperedges -/
structure HyperGraph where
nodes : List Nat
edges : List HyperEdge
/-- HyperGraph Rewriting Production -/
structure RewriteRule where
lhs : HyperGraph
rhs : HyperGraph
canApply : HyperGraph → Prop
-- ============================================================
-- 3. SHEAF CONSISTENCY (Local-to-Global)
-- ============================================================
/-- A Section represents the data (Value) at a specific Node or Region -/
structure Section where
data : Array Q16_16
entropy : Q16_16
/--
Consistency check between two sections.
Used to ensure the "Gluing" axiom holds across node boundaries.
-/
def isConsistent (s1 s2 : Section) (overlap : Q16_16) : Prop :=
-- Simplification: L1 distance of data is bounded by overlap threshold
True -- Placeholder for formal bounded distance proof
/--
The Sheaf condition: local sections can be uniquely glued
if they are consistent on their overlaps.
-/
structure Sheaf where
sections : Nat → Section
restriction : Nat → Nat → Section → Section -- Maps section at node B to section at part A
consistency : ∀ a b, isConsistent (sections a) (sections b) (Q16_16.ofFloat 0.1)
-- ============================================================
-- 4. UNIFIED STRUCTURE
-- ============================================================
structure MereotopologicalSheafHypergraph where
mereo : Mereology
topo : Topology
hgraph : HyperGraph
sheaf : Sheaf
-- The core constraint: HyperEdges must respect Topological connectivity
lawfulEdges : ∀ e ∈ hgraph.edges, ∀ n1 n2, n1 ∈ e.nodes → n2 ∈ e.nodes → n1 ≠ n2 → topo.connected n1 n2
/--
The Global Coherence Theorem (Skeleton):
If the hypergraph is consistent under its sheaf projections,
the manifold is in a "Stable Constitution".
-/
theorem global_coherence_stable
(_m : MereotopologicalSheafHypergraph)
(_h_consistent : ∀ e ∈ _m.hgraph.edges, ∃ s, ∀ n ∈ e.nodes, _m.sheaf.sections n = _m.sheaf.restriction n 0 s) :
True := by
trivial
end Semantics.MereotopologicalSheafHypergraph