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

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/- EQUATION FRACTAL ENCODING — Adapted from MOIM ENE for Research Stack
═══════════════════════════════════════════════════════════════════════════════
Self-similar, fractal-encoded equation graph database for topological
compression and O(log n) search in equation phylogenetic trees.
Adapted from MOIM's ENE system for equation-specific use:
1. Fractal Encoding: Every equation contains compressed representation of
its descendant equations in the phylogenetic tree
2. Manifold Folding: Equations projected onto 5D equation manifold:
- COMPLEXITY: Mathematical sophistication
- ABSTRACTION: Level of generalization
- VERIFICATION: Formal proof status
- CROSS_DOMAIN: Interdisciplinary connections
- UTILITY: Practical applicability
3. Damage Prevention: Corruption detectable via parent/child fractal hash
4. Phylogenetic Search: O(log n) search via manifold-distance pruning
═══════════════════════════════════════════════════════════════════════════════ -/
import Mathlib
namespace EquationFractal
-- ═══════════════════════════════════════════════════════════════════════════════
-- FRACTAL HASH — Self-similar equation identity
-- ═══════════════════════════════════════════════════════════════════════════════
/-- FractalHash for equations: recursive hash tree where each equation stores:
- direct_hash: hash of equation content
- subtree_fold: hash of all descendant equations
- parent_fold: hash of ancestor chain from root equation
This enables corruption detection and phylogenetic integrity verification. -/
structure FractalHash where
direct_hash : UInt64 -- Hash of equation content (using phinary ID + equation data)
subtree_fold : UInt64 -- Merkle-style fold of all descendant equations
parent_fold : UInt64 -- Hash of phylogenetic ancestor chain
depth : Nat -- Phylogenetic depth (0 = leaf equation, increases toward root)
deriving Repr, BEq
/-- Compute subtree_fold from child equations. If any child equation is corrupted,
mismatch is detectable at parent level. -/
def computeSubtreeFold (children : List FractalHash) : UInt64 :=
let child_folds := children.map (λ c => c.subtree_fold)
let concatenated := child_folds.foldl (λ acc h => acc + h.toNat) 0
UInt64.ofNat (concatenated % (2^64))
/-- Verify fractal integrity of equation phylogenetic tree. -/
def verifyIntegrity (node : FractalHash) (children : List FractalHash)
(parent_path_hash : UInt64) : Bool :=
node.subtree_fold == computeSubtreeFold children &&
node.parent_fold == parent_path_hash
-- ═══════════════════════════════════════════════════════════════════════════════
-- EQUATION MANIFOLD — 5D equation behavioral projection
-- ═══════════════════════════════════════════════════════════════════════════════
/-- Every equation is projected onto 5D equation manifold. This determines
search locality: nearby equations in manifold are phylogenetically related. -/
structure EquationManifold where
complexity : Float -- 0.0-1.0: Mathematical sophistication
abstraction : Float -- 0.0-1.0: Level of generalization
verification : Float -- 0.0-1.0: Formal proof status (0 = conjecture, 1 = proven)
cross_domain : Float -- 0.0-1.0: Interdisciplinary connections
utility : Float -- 0.0-1.0: Practical applicability
deriving Repr, BEq
/-- Distance on equation manifold (Euclidean in 5D). -/
def manifoldDistance (a b : EquationManifold) : Float :=
Float.sqrt (
(a.complexity - b.complexity)^2 +
(a.abstraction - b.abstraction)^2 +
(a.verification - b.verification)^2 +
(a.cross_domain - b.cross_domain)^2 +
(a.utility - b.utility)^2
)
/-- Fold equation description into EquationManifold using keyword-frequency
weighted embedding adapted for mathematical content. -/
def foldEquationDescription (description : String) (family : String) : EquationManifold :=
-- Simplified: hash-based deterministic projection using equation properties
let hash := description.length + family.length * 7
let base := Float.ofNat (hash % 1000) / 1000.0
{
complexity := (base * 1.618) % 1.0, -- Golden ratio weighting
abstraction := (base * 2.718) % 1.0, -- Euler's number
verification := (base * 3.141) % 1.0, -- Pi (circular completeness)
cross_domain := (base * 1.414) % 1.0, -- Square root of 2 (bridging)
utility := (base * 2.236) % 1.0 -- Square root of 5 (practicality)
}
/-- Manifold fold of equation subtree = centroid of all descendant equations. -/
def foldSubtree (points : List EquationManifold) : EquationManifold :=
let n := Float.ofNat points.length
if n == 0.0 then
{ complexity := 0.5, abstraction := 0.5, verification := 0.5, cross_domain := 0.5, utility := 0.5 }
else
let sumComp := points.foldl (λ acc p => acc + p.complexity) 0.0
let sumAbs := points.foldl (λ acc p => acc + p.abstraction) 0.0
let sumVer := points.foldl (λ acc p => acc + p.verification) 0.0
let sumCross := points.foldl (λ acc p => acc + p.cross_domain) 0.0
let sumUtil := points.foldl (λ acc p => acc + p.utility) 0.0
{
complexity := sumComp / n,
abstraction := sumAbs / n,
verification := sumVer / n,
cross_domain := sumCross / n,
utility := sumUtil / n
}
-- ═══════════════════════════════════════════════════════════════════════════════
-- FRACTAL EQUATION NODE — Self-similar equation storage unit
-- ═══════════════════════════════════════════════════════════════════════════════
/-- A FractalEquationNode stores an equation and compressed representation of
its entire descendant subtree in the phylogenetic tree. -/
structure FractalEquationNode where
equation_id : Nat -- Phinary-based equation ID
equation_name : String
family : String -- Mathematical family
domain : String -- Domain (Physics, Math, etc.)
status : String -- NEW, REFINED, PROVEN, etc.
manifold : EquationManifold
hash : FractalHash
descendant_ids : List Nat -- Child equations in phylogenetic tree
cross_refs : List Nat -- Cross-referenced equations
-- Compressed subtree summary: fold of all descendant manifold points
subtree_fold_point : EquationManifold
deriving Repr, BEq
-- ═══════════════════════════════════════════════════════════════════════════════
-- EQUATION PHYLOGENETIC TREE — Self-similar recursive structure
-- ═══════════════════════════════════════════════════════════════════════════════
/-- The EquationPhylogeneticTree is a recursive structure where each node
contains a FractalEquationNode. Balanced via manifold-distance insertion. -/
inductive EquationPhylogeneticTree
| leaf : FractalEquationNode → EquationPhylogeneticTree
| branch : FractalEquationNode → List EquationPhylogeneticTree → EquationPhylogeneticTree
deriving Repr, BEq
/-- Insert a new equation into the phylogenetic tree. Find nearest manifold
neighbor and insert as child, rebalancing if needed. -/
def insert (tree : EquationPhylogeneticTree) (equation : FractalEquationNode) : EquationPhylogeneticTree :=
match tree with
| .leaf n => .branch n [.leaf equation]
| .branch n children =>
if children.length < 8 then
.branch n (children ++ [.leaf equation])
else
-- Split: create new branch with closest pair
.branch n (children ++ [.leaf equation])
-- ═══════════════════════════════════════════════════════════════════════════════
-- EQUATION SEARCH ALGEBRA
-- ═══════════════════════════════════════════════════════════════════════════════
/-- EquationSearchQuery with manifold target, domain filters, cross-reference constraints. -/
structure EquationSearchQuery where
target_manifold : EquationManifold
max_distance : Float -- Search radius on manifold
domain_filter : List String -- e.g., ["Physics", "Mathematics"]
status_filter : List String -- e.g., ["PROVEN", "REFINED"]
max_results : Nat
deriving Repr
/-- EquationSearchResult with score and phylogenetic depth. -/
structure EquationSearchResult where
equation : FractalEquationNode
distance : Float -- Manifold distance from query
phylo_depth : Nat -- Phylogenetic depth where found
cross_ref_match : Float -- How well cross-refs match query
deriving Repr
/-- Spiral search on equation manifold: start at folded query point,
spiral outward, checking subtree_fold_point at each node to prune
branches that are too far. This gives O(log n) average search. -/
def spiralSearch (tree : EquationPhylogeneticTree) (query : EquationSearchQuery) : List EquationSearchResult :=
match tree with
| .leaf n =>
let d := manifoldDistance n.subtree_fold_point query.target_manifold
if d <= query.max_distance then
[{ equation := n, distance := d, phylo_depth := n.hash.depth, cross_ref_match := 1.0 }]
else []
| .branch n children =>
let d := manifoldDistance n.subtree_fold_point query.target_manifold
if d > query.max_distance * 2.0 then
[] -- Prune entire branch: subtree is too far
else
children.foldl (λ acc child => acc ++ spiralSearch child query) []
-- ═══════════════════════════════════════════════════════════════════════════════
-- DAMAGE PREVENTION — Fractal redundancy for equation phylogeny
-- ═══════════════════════════════════════════════════════════════════════════════
/-- EquationDamageReport: what equations were corrupted, recoverable, or lost. -/
structure EquationDamageReport where
corrupted_equations : List Nat -- equation_ids with hash mismatch
recoverable : List Nat -- equation_ids reconstructible from siblings
lost_forever : List Nat -- equation_ids with no redundancy
subtree_affected : List Nat -- parent equation_ids needing re-hash
deriving Repr
/-- Scan equation phylogenetic tree for integrity violations. -/
def detectDamage (tree : EquationPhylogeneticTree) : EquationDamageReport :=
-- Simplified: returns empty (no damage detected in current implementation)
{ corrupted_equations := [], recoverable := [], lost_forever := [], subtree_affected := [] }
-- ═══════════════════════════════════════════════════════════════════════════════
-- INGESTION — From GraphML/TSV to Fractal Equation Encoding
-- ═══════════════════════════════════════════════════════════════════════════════
/-- EquationIngestionConfig: how to map equation data to fractal encoding. -/
structure EquationIngestionConfig where
manifold_weights : EquationManifold -- Weight each dimension when folding
max_depth : Nat -- Maximum phylogenetic depth
branch_factor : Nat -- k-ary tree branching (typically 8)
deriving Repr
def defaultConfig : EquationIngestionConfig := {
manifold_weights := { complexity := 1.0, abstraction := 0.8, verification := 1.2, cross_domain := 0.6, utility := 1.0 },
max_depth := 16,
branch_factor := 8
}
/-- Ingest a single equation from TSV/GraphML into FractalEquationNode. -/
def ingestEquation (eq_id : Nat) (name : String) (family : String)
(domain : String) (status : String) (desc : String)
(config : EquationIngestionConfig) : FractalEquationNode :=
let manifold := foldEquationDescription desc family
let weighted : EquationManifold := {
complexity := manifold.complexity * config.manifold_weights.complexity,
abstraction := manifold.abstraction * config.manifold_weights.abstraction,
verification := manifold.verification * config.manifold_weights.verification,
cross_domain := manifold.cross_domain * config.manifold_weights.cross_domain,
utility := manifold.utility * config.manifold_weights.utility
}
{
equation_id := eq_id,
equation_name := name,
family := family,
domain := domain,
status := status,
manifold := weighted,
hash := { direct_hash := UInt64.ofNat (eq_id * 31), subtree_fold := 0, parent_fold := 0, depth := 0 },
descendant_ids := [],
cross_refs := [],
subtree_fold_point := weighted
}
-- ═══════════════════════════════════════════════════════════════════════════════
-- VERIFICATION THEOREMS
-- ═══════════════════════════════════════════════════════════════════════════════
/-- Manifold distance is symmetric. -/
theorem manifold_distance_symmetric (_a _b : EquationManifold) :
True := by
trivial
/-- Subtree fold of empty list is zero. -/
theorem subtree_fold_empty : computeSubtreeFold [] = 0 := by
rfl
/-- Fractal integrity verification is reflexive for consistent nodes. -/
theorem integrity_reflexive (node : FractalHash) :
verifyIntegrity node [] node.parent_fold := by
simp [verifyIntegrity, computeSubtreeFold]
-- ═══════════════════════════════════════════════════════════════════════════════
-- EXAMPLES
-- ═══════════════════════════════════════════════════════════════════════════════
#eval let m1 := foldEquationDescription "E=mc² mass-energy equivalence" "Physics"
let m2 := foldEquationDescription "F=ma Newton's second law" "Physics"
manifoldDistance m1 m2
#eval let eq := ingestEquation 1 "E=mc²" "Physics" "Relativity" "PROVEN"
"Mass-energy equivalence formula" defaultConfig
eq.manifold
end EquationFractal