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

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import Semantics.FixedPoint
import Semantics.ManifoldStructures
namespace Semantics.VirtualWarpMetric
open Semantics
/--
Virtual Warp Metric (Layer 7)
dI² = -dτ² + (dH - v_eff * f * Ω * dτ)²
This metric governs the information-theoretic displacement of entropy
across the manifold's virtual surface.
-/
structure VirtualWarpParameters where
kappa : Q16_16 -- κ : Steepness / coupling intensity
opcodeEfficacy : Q16_16 -- Ω : Performance tier of the instruction
localVelocity : Q16_16 -- v_local : Native hardware throughput
coherence : Q16_16 -- φ : Phase coherence with past anchors
properTime : Q16_16 -- dτ : Execution clock cycles
entropyDisplacement : Q16_16 -- dH : Target entropy change
deriving Repr, DecidableEq
/--
Effective compression velocity: v_eff = v_local / (1 - φ)
Encapsulates the 'boost' achieved by high coherence.
-/
def effectiveVelocity (params : VirtualWarpParameters) : Q16_16 :=
let one := Q16_16.one
let denom := Q16_16.sub one params.coherence
-- Avoid division by zero: clamp denominator to at least epsilon
let safeDenom := if Q16_16.le denom Q16_16.zero then Q16_16.epsilon else denom
Q16_16.div params.localVelocity safeDenom
/--
Warp coupling constant: f_warp = f(x_i) * Ω
Typically derived from the SSS constant Φ_sss.
-/
def warpCoupling (params : VirtualWarpParameters) (sssConstant : Q16_16) : Q16_16 :=
-- f = sigmoid(-κ * Φ_sss)
-- Approximation: sigmoid(x) ≈ 0.5 + 0.5 * x for small x
let inner := Q16_16.mul params.kappa sssConstant
let ramp := Q16_16.sub (Q16_16.ofNat 1 / Q16_16.ofNat 2) inner
Q16_16.mul ramp params.opcodeEfficacy
/--
Calculates the Virtual Warp Metric value: dI²
-/
def calculateVirtualWarpMetric (params : VirtualWarpParameters) (sssConstant : Q16_16) : Q16_16 :=
let dt := params.properTime
let dh := params.entropyDisplacement
let veff := effectiveVelocity params
let f_omega := warpCoupling params sssConstant
-- dI² = (dH - v_eff * f * Ω * dτ)² - dτ²
let velocityWork := Q16_16.mul veff (Q16_16.mul f_omega dt)
let spaceTermInner := Q16_16.abs (Q16_16.sub dh velocityWork)
let spaceTerm := Q16_16.mul spaceTermInner spaceTermInner
let timeTerm := Q16_16.mul dt dt
Q16_16.sub spaceTerm timeTerm
/--
Invariant: The metric is stable if the SSS constant and opcode efficacy
yield a positive coupling (sustained bubble).
-/
def isVirtualWarpStable (params : VirtualWarpParameters) (sssConstant : Q16_16) : Bool :=
Q16_16.ge (warpCoupling params sssConstant) Q16_16.zero
-- =============================================================================
-- VERIFICATION
-- =============================================================================
#eval calculateVirtualWarpMetric
{ kappa := Q16_16.one
, opcodeEfficacy := Q16_16.one
, localVelocity := Q16_16.one
, coherence := Q16_16.ofNat 0 -- 0 coherence
, properTime := Q16_16.epsilon
, entropyDisplacement := Q16_16.one
} Q16_16.zero
end Semantics.VirtualWarpMetric