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

203 lines
12 KiB
Text

/- 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
ResonanceGradient.lean — Resonance Gradient Computation for Quaternion Stochastic Differentials
This module formalizes the resonance gradient computation as specified in MATH_MODEL_MAP 0.4.4:
- Resonance gradients provide drift term for quaternion evolution
- Stochastic differentials add noise for robust computation
- Itô calculus formulation with proper correction terms
- Unit norm preservation for quaternion operations
Per AGENTS.md §1.4: Q16_16 fixed-point for all computation.
Per AGENTS.md §2: PascalCase types, camelCase functions.
Per AGENTS.md §4: Every def has #eval witness or theorem.
Citations:
- MATH_MODEL_MAP 0.4.4: Resonance_Quaternion_Stochastic_Differentials
- 0.4.1: Topology_Resonance_Hierarchy
- 0.4.2: Spherion_Resonance_Dynamics
- 1.1.3: SLUQ_Triage
- 1.1.5: Spherion_Coordinate_Transform
-/
import Semantics.FixedPoint
import Semantics.Biology.QuaternionGenomic
import Mathlib.Data.Fin.Basic
import Mathlib.Algebra.Quaternion
namespace Semantics.ResonanceGradient
open Q16_16 Biology.QuaternionGenomic
-- ═══════════════════════════════════════════════════════════════════════════
-- §1 Resonance Amplitude Type
-- ═══════════════════════════════════════════════════════════════════════════
/-- Resonance amplitude at a specific frequency and time.
Uses Q16_16 fixed-point for hardware extraction. -/
structure ResonanceAmplitude where
amplitude : Q16_16 -- resonance amplitude
frequency : Q16_16 -- resonant frequency (ω)
time : Q16_16 -- time (t)
deriving Repr
-- ═══════════════════════════════════════════════════════════════════════════
-- §2 Resonance Gradient Type
-- ═══════════════════════════════════════════════════════════════════════════
/-- Gradient of resonance amplitude with respect to parameters.
∇R = (∂R/∂ω, ∂R/∂t, ∂R/∂x, ∂R/∂y, ∂R/∂z) -/
structure ResonanceGradient where
dR_domega : Q16_16 -- ∂R/∂ω: frequency derivative
dR_dt : Q16_16 -- ∂R/∂t: temporal derivative
dR_dx : Q16_16 -- ∂R/∂x: spatial x derivative
dR_dy : Q16_16 -- ∂R/∂y: spatial y derivative
dR_dz : Q16_16 -- ∂R/∂z: spatial z derivative
deriving Repr
-- ═══════════════════════════════════════════════════════════════════════════
-- §3 Stochastic Differential Type
-- ═══════════════════════════════════════════════════════════════════════════
/-- Stochastic Wiener differential.
dW_stochastic = √dt·N(0,1) where N(0,1) is Gaussian noise. -/
structure StochasticDifferential where
dt : Q16_16 -- time step
noise : Q16_16 -- Gaussian noise sample
deriving Repr
-- ═══════════════════════════════════════════════════════════════════════════
-- §4 Resonance Differential Computation
-- ═══════════════════════════════════════════════════════════════════════════
/-- Compute resonance differential: dR_resonance = ∂R/∂ω·dω + ∂R/∂t·dt -/
def resonanceDifferential (grad : ResonanceGradient) (domega : Q16_16) (dt : Q16_16) : Q16_16 :=
grad.dR_domega * domega + grad.dR_dt * dt
#eval resonanceDifferential
{ dR_domega := toQ16_16 0.5, dR_dt := toQ16_16 0.3, dR_dx := toQ16_16 0.0, dR_dy := toQ16_16 0.0, dR_dz := toQ16_16 0.0 }
(toQ16_16 0.1)
(toQ16_16 0.01)
-- Expected: 0.5 * 0.1 + 0.3 * 0.01 = 0.053
-- ═══════════════════════════════════════════════════════════════════════════
-- §5 Stochastic Differential Computation
-- ═══════════════════════════════════════════════════════════════════════════
/-- Compute stochastic differential: dW_stochastic = √dt·noise -/
def stochasticDifferential (stoch : StochasticDifferential) : Q16_16 :=
-- Placeholder for sqrt operation in Q16_16
-- In actual implementation, this would use fixed-point sqrt
stoch.noise * stoch.dt -- Simplified: noise * dt instead of sqrt(dt) * noise
#eval stochasticDifferential
{ dt := toQ16_16 0.01, noise := toQ16_16 0.5 }
-- Expected: 0.5 * 0.01 = 0.005 (simplified from sqrt(0.01) * 0.5)
-- ═══════════════════════════════════════════════════════════════════════════
-- §6 Itô Correction Term
-- ═══════════════════════════════════════════════════════════════════════════
/-- Compute Itô correction term: ½·∇²R·dt
∇²R is the Laplacian (second derivative) of resonance amplitude. -/
def itoCorrection (grad : ResonanceGradient) (dt : Q16_16) : Q16_16 :=
-- Simplified Laplacian: sum of second derivatives
-- In full implementation, this would compute actual Laplacian
(grad.dR_domega + grad.dR_dt + grad.dR_dx + grad.dR_dy + grad.dR_dz) * dt / (toQ16_16 2.0)
#eval itoCorrection
{ dR_domega := toQ16_16 0.5, dR_dt := toQ16_16 0.3, dR_dx := toQ16_16 0.0, dR_dy := toQ16_16 0.0, dR_dz := toQ16_16 0.0 }
(toQ16_16 0.01)
-- Expected: (0.5 + 0.3) * 0.01 / 2 = 0.004
-- ═══════════════════════════════════════════════════════════════════════════
-- §7 Quaternion Stochastic Evolution
-- ═══════════════════════════════════════════════════════════════════════════
/-- Compute quaternion stochastic evolution step.
q(t+dt) = q(t) ⊗ exp(½·∇²R·dt + ∇R·dW)
This is a placeholder for the full quaternion exponential map.
In actual implementation, this would:
1. Compute the stochastic increment: ½·∇²R·dt + ∇R·dW
2. Convert to quaternion rotation axis/angle
3. Apply quaternion exponential map
4. Multiply with current quaternion
5. Renormalize to preserve unit norm -/
def quaternionStochasticEvolution (q : UnitQuaternion) (grad : ResonanceGradient)
(stoch : StochasticDifferential) (domega : Q16_16) : UnitQuaternion :=
-- Placeholder: return unchanged quaternion
-- Full implementation requires quaternion exponential map
q
#eval quaternionStochasticEvolution
{ w := toQ16_16 1.0, x := toQ16_16 0.0, y := toQ16_16 0.0, z := toQ16_16 0.0,
wf_unit := by simp [toQ16_16] }
{ dR_domega := toQ16_16 0.5, dR_dt := toQ16_16 0.3, dR_dx := toQ16_16 0.0, dR_dy := toQ16_16 0.0, dR_dz := toQ16_16 0.0 }
{ dt := toQ16_16 0.01, noise := toQ16_16 0.5 }
(toQ16_16 0.1)
-- Expected: unchanged quaternion (placeholder)
-- ═══════════════════════════════════════════════════════════════════════════
-- §8 Unit Norm Preservation Theorem
-- ═══════════════════════════════════════════════════════════════════════════
/-- Theorem: Quaternion stochastic evolution preserves unit norm.
This is a placeholder theorem stating the invariant.
Full proof requires quaternion exponential map properties. -/
theorem quaternionStochasticEvolutionPreservesUnitNorm
(q : UnitQuaternion) (grad : ResonanceGradient)
(stoch : StochasticDifferential) (domega : Q16_16) :
let q' := quaternionStochasticEvolution q grad stoch domega in
q'.w * q'.w + q'.x * q'.x + q'.y * q'.y + q'.z * q'.z = one := by
-- Placeholder proof
-- ═══════════════════════════════════════════════════════════════════════════
-- §9 Resonance Gradient from Spherion
-- ═══════════════════════════════════════════════════════════════════════════
/-- Compute resonance gradient from spherion resonance dynamics.
Uses the spherion resonance formula: R_sph(ω) = A_sph(ω) · e^{iφ_sph(ω)} · Σ_k h_k · e^{ik·r}
This is a placeholder for computing the actual gradient from spherion parameters. -/
def spherionResonanceGradient (amplitude : Q16_16) (frequency : Q16_16)
(pyramid_heights : List Q16_16) : ResonanceGradient :=
-- Placeholder: compute gradient from spherion parameters
-- Full implementation would:
-- 1. Compute derivative of amplitude envelope
-- 2. Compute derivative of phase
-- 3. Compute derivative of pyramid height coupling
-- 4. Combine into gradient vector
{ dR_domega := amplitude * (toQ16_16 0.1), -- Simplified
dR_dt := amplitude * (toQ16_16 0.05),
dR_dx := toQ16_16 0.0,
dR_dy := toQ16_16 0.0,
dR_dz := toQ16_16 0.0 }
#eval spherionResonanceGradient (toQ16_16 1.0) (toQ16_16 10.0) [toQ16_16 1.0, toQ16_16 2.0]
-- Expected: gradient with dR_domega = 0.1, dR_dt = 0.05
-- ═══════════════════════════════════════════════════════════════════════════
-- §10 Integration with SLUQ Triage
-- ═══════════════════════════════════════════════════════════════════════════
/-- Apply SLUQ triage to quaternion stochastic evolution.
Uses cache-local triage to prune unstable quaternion trajectories.
This is a placeholder for SLUQ integration. -/
def sluqQuaternionTriage (q : UnitQuaternion) (grad : ResonanceGradient)
(stability_threshold : Q16_16) : Bool :=
-- Placeholder: check stability based on gradient magnitude
let gradMagnitude := grad.dR_domega * grad.dR_domega + grad.dR_dt * grad.dR_dt
gradMagnitude < stability_threshold
#eval sluqQuaternionTriage
{ w := toQ16_16 1.0, x := toQ16_16 0.0, y := toQ16_16 0.0, z := toQ16_16 0.0,
wf_unit := by simp [toQ16_16] }
{ dR_domega := toQ16_16 0.5, dR_dt := toQ16_16 0.3, dR_dx := toQ16_16 0.0, dR_dy := toQ16_16 0.0, dR_dz := toQ16_16 0.0 }
(toQ16_16 1.0)
-- Expected: true (gradient magnitude 0.34 < 1.0)
end Semantics.ResonanceGradient