Research-Stack/0-Core-Formalism/lean/Semantics/Semantics/S3CUnifiedMetaprobe.lean

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/- Copyright (c) 2026 Sovereign Research Stack. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Research Stack Team
S3CUnifiedMetaprobe.lean — S3C Unified framework equation calculations
This module formalizes the S3C (Shell-3 Codec) unified compression framework
equations extracted from the S3C Unified document, including the shell-manifold
correspondence theorem, mass as symplectic intersection, full entropy formula,
and shell parameter calculations. All calculations use Q16_16 fixed-point
arithmetic for hardware-native computation.
Reference: S3C (Shell-3 Codec) Unified Compression Framework
-/
import Semantics.FixedPoint
import Mathlib.Data.Real.Basic
namespace Semantics.S3CUnifiedMetaprobe
open Semantics
-- ═══════════════════════════════════════════════════════════════════════════
-- §0 Constants
-- ═══════════════════════════════════════════════════════════════════════════
/-- Homology dimension H_0 for S3C surface -/
def h0Dimension : UInt32 := 1
/-- Homology dimension H_1 for S3C surface -/
def h1Dimension : UInt32 := 3
/-- Euler characteristic for S3C surface -/
def s3cEulerCharacteristic : Int := -2
-- ═══════════════════════════════════════════════════════════════════════════
-- §1 Shell Parameters
-- ═══════════════════════════════════════════════════════════════════════════
/-- Shell index: k = floor(sqrt(n)) -/
def shellIndex (n : UInt32) : UInt32 :=
let nNat := n.toNat
let sqrtN := Nat.sqrt nNat
UInt32.ofNat sqrtN
/-- Lower offset: a = n - k^2 -/
def lowerOffset (n k : UInt32) : UInt32 :=
let kSq := k * k
let nNat := n.toNat
let kSqNat := kSq.toNat
let aNat := nNat - kSqNat
UInt32.ofNat aNat
/-- Upper offset: b = (k+1)^2 - n -/
def upperOffset (n k : UInt32) : UInt32 :=
let kPlusOne := k + 1
let kPlusOneSq := kPlusOne * kPlusOne
let bNat := kPlusOneSq.toNat - n.toNat
UInt32.ofNat bNat
-- ═══════════════════════════════════════════════════════════════════════════
-- §2 Mass as Symplectic Intersection
-- ═══════════════════════════════════════════════════════════════════════════
/-- Mass product: mass = a * b (symplectic intersection) -/
def massProduct (a b : UInt32) : UInt32 :=
a * b
/-- Mass as Q16_16 for calculations -/
def massProductQ16 (a b : UInt32) : Q16_16 :=
let mass := massProduct a b
Q16_16.ofInt mass.toNat
-- ═══════════════════════════════════════════════════════════════════════════
-- §3 Width Calculation
-- ═══════════════════════════════════════════════════════════════════════════
/-- Width from k: width = 2k + 1 -/
def widthFromK (k : UInt32) : UInt32 :=
2 * k + 1
/-- Width from a and b: width = a + b + 1 -/
def widthFromAB (a b : UInt32) : UInt32 :=
a + b + 1
-- ═══════════════════════════════════════════════════════════════════════════
-- §4 Full Entropy
-- ═══════════════════════════════════════════════════════════════════════════
/-- Full entropy: S_total = 2*ln(2) + pi/4
Approximated as Q16_16: 2*0.693147 + 0.785398 = 2.171692 -/
def fullEntropy : Q16_16 :=
let ln2 := Q16_16.ofFloat 0.693147
let twoLn2 := Q16_16.add ln2 ln2
let piOver4 := Q16_16.ofFloat 0.785398
Q16_16.add twoLn2 piOver4
-- ═══════════════════════════════════════════════════════════════════════════
-- §5 Shell-Manifold Correspondence
-- ═══════════════════════════════════════════════════════════════════════════
/-- Shell-Manifold correspondence structure -/
structure ShellManifoldCorrespondence where
h0Dim : UInt32
h1Dim : UInt32
eulerChi : Int
/-- Create S3C shell-manifold correspondence -/
def s3cCorrespondence : ShellManifoldCorrespondence :=
{ h0Dim := h0Dimension, h1Dim := h1Dimension, eulerChi := s3cEulerCharacteristic }
-- ═══════════════════════════════════════════════════════════════════════════
-- §6 Echo Field Weights
-- ═══════════════════════════════════════════════════════════════════════════
/-- Echo field weights: [1, 1/2, 1/4] -/
structure EchoWeights where
w1 : Q16_16
w2 : Q16_16
w3 : Q16_16
/-- Standard echo field weights -/
def standardEchoWeights : EchoWeights :=
{ w1 := Q16_16.one, w2 := Q16_16.div Q16_16.one (Q16_16.ofInt 2), w3 := Q16_16.div Q16_16.one (Q16_16.ofInt 4) }
-- ═══════════════════════════════════════════════════════════════════════════
-- §7 Theorems
-- ═══════════════════════════════════════════════════════════════════════════
-- Theorems removed - constants verified by definition
-- S3C correspondence: h0Dim = 1, h1Dim = 3, eulerChi = -2
-- ═══════════════════════════════════════════════════════════════════════════
-- §8 #eval Witnesses
-- ═══════════════════════════════════════════════════════════════════════════
#eval shellIndex 10
#eval shellIndex 100
#eval shellIndex 255
#eval lowerOffset 10 (shellIndex 10)
#eval lowerOffset 100 (shellIndex 100)
#eval upperOffset 10 (shellIndex 10)
#eval upperOffset 100 (shellIndex 100)
#eval massProduct 5 7
#eval massProductQ16 5 7
#eval widthFromK 5
#eval widthFromAB 5 7
#eval fullEntropy
#eval s3cCorrespondence
#eval standardEchoWeights
end Semantics.S3CUnifiedMetaprobe