Research-Stack/2-Search-Space/PIST/PISTMachine.lean

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import Semantics.FixedPoint
import Mathlib.Data.Nat.Sqrt
namespace Semantics.PISTMachine
/-! # PIST State Machine — Formal Core
Revised and Neutralized Language Specification.
Anchored to: ChatGPT-Making_It_Rigorous.md (Definitions 1-11)
-/
/-- Phase Sort: Energy bands for machine orchestration. -/
inductive Phase
| grounded -- m(n) = 0 (Anchor/Square)
| drift -- Low tension
| seismic -- High tension
deriving Repr, BEq, DecidableEq
/-- Transfer Move Flags: Admissible transition events. -/
inductive MoveFlag
| linearStep -- n_{t+1} = n_t ± 1
| resonanceJump -- mass preservation
| rejected -- P_perp violation
| crystallized -- m(n) hits 0
deriving Repr, BEq, DecidableEq
/-- State Vector: Formal machine configuration. -/
structure State where
n : Nat -- Active coordinate
phase : Phase -- Coarse energy class
friction : Nat -- Loss register
mass : Nat -- Hyperbola Index m(n)
deriving Repr, BEq, DecidableEq
/-- Square Anchoring: Distance to lower square boundary. -/
def a (n : Nat) : Nat :=
let k := Nat.sqrt n
n - k^2
/-- Square Anchoring: Distance to upper square boundary. -/
def b (n : Nat) : Nat :=
let k := Nat.sqrt n
(k + 1)^2 - n
/-- Hyperbola Index: Symmetric square-gap tension. -/
def hyperbolaIndex (n : Nat) : Nat :=
(a n) * (b n)
/-- Normalized Tension Ratio: ρ(n) ∈ [0, 1]. -/
def rho (n : Nat) : Float :=
let k := Nat.sqrt n
let maxMass := ((2 * k + 1)^2 : Nat).toFloat / 4.0
if maxMass == 0 then 0.0
else (hyperbolaIndex n).toFloat / maxMass
/-- Phase Classifier: Maps mass to coarse energy bands. -/
def classifyPhase (n : Nat) (alpha : Float := 0.5) : Phase :=
let m := hyperbolaIndex n
if m == 0 then Phase.grounded
else if rho n < alpha then Phase.drift
else Phase.seismic
/-- Mirror Involution: Symmetry-preserving resonance jump. -/
def mirror (n : Nat) : Nat :=
let k := Nat.sqrt n
(k + 1)^2 + k^2 - n
/-- Lyapunov Functional: Scalar energy for strict descent. -/
def lambda (s : State) : Nat :=
s.mass + s.friction
/-! # Theorems -/
/-- Theorem: Mirror preserves mass. -/
theorem mirror_preserves_mass (n : Nat) :
hyperbolaIndex (mirror n) = hyperbolaIndex n := by
let k := Nat.sqrt n
have ha : a (mirror n) = b n := by
simp [a, mirror, k]
omega
have hb : b (mirror n) = a n := by
simp [b, mirror, k]
omega
simp [hyperbolaIndex, ha, hb, Nat.mul_comm]
/-- Theorem: Zero-mass iff square. -/
theorem zero_mass_iff_square (n : Nat) :
hyperbolaIndex n = 0 ↔ (Nat.sqrt n)^2 = n := by
simp [hyperbolaIndex, a, b]
constructor
· intro h
cases Nat.eq_zero_or_pos (Nat.sqrt n + 1)^2 with
| inl h_zero =>
-- Contradiction: (k+1)^2 is never zero for Nat
have h_pos : (Nat.sqrt n + 1)^2 > 0 := Nat.pos_of_ne_zero (by intro h_z; injection h_z)
exact False.elim (Nat.lt_irrefl 0 (h_pos.trans_le (Nat.zero_le _)))
| inr h_pos =>
-- If a*b = 0 then a=0 or b=0.
-- But b = (k+1)^2 - n > 0 because n < (k+1)^2 by sqrt properties.
have hn : n < (Nat.sqrt n + 1)^2 := Nat.lt_succ_sqrt n
have hb_pos : (Nat.sqrt n + 1)^2 - n > 0 := Nat.sub_pos_of_lt hn
have ha_zero : n - (Nat.sqrt n)^2 = 0 := by
exact Nat.eq_zero_of_mul_eq_zero_left h (Nat.ne_of_gt hb_pos)
exact Nat.eq_of_sub_eq_zero ha_zero
· intro h
simp [h]
/-! ## MNLOG-001 Mass Number Valuations for PISTMachine Theorems
Doctrine: Logic can have a mass-number value only after we say which reality is weighing it.
These valuations are field-local under the PIST machine reality contract.
-/
/-- Reality contract for PIST machine theorems -/
structure PISTRealityField where
domain := "PIST state machine"
contract := "hyperbola index preservation and square boundary invariants"
validator := "algebraic proof (omega tactics)"
/-- Residual model for PIST machine theorems -/
structure PISTResidualModel where
uncertainty : Nat -- Unresolved edge cases
assumptions : Nat -- Axiomatic dependencies (sqrt properties)
cost : Nat -- Proof complexity
/-- Projection rule for PIST machine theorems -/
structure PISTProjectionRule where
name := "linear projection"
scaling := 256 -- Q8_8 approximation
/-- Logical mass structure for PIST theorems -/
structure PISTLogicalMass where
field : PISTRealityField
admissible : Nat -- Proof strength, invariant preservation
residual : PISTResidualModel
projection : PISTProjectionRule
/-- Compute mass number for PIST theorem -/
def PISTLogicalMass.massNumber (lm : PISTLogicalMass) : Q0_16 :=
let totalResidual := lm.residual.uncertainty + lm.residual.assumptions + lm.residual.cost
let denom := 1 + totalResidual
let maxVal : Nat := 32767
if denom = 0 then Q0_16.zero
else
let scaled := if lm.admissible ≥ maxVal then maxVal else lm.admissible
let denomScaled := if denom ≥ maxVal then maxVal else denom
let result := scaled * lm.projection.scaling / denomScaled
⟨result.toUInt16⟩
/-- Mass number for mirror_preserves_mass theorem -/
def mirrorPreservesMassMass : PISTLogicalMass :=
{
field := { domain := "PIST state machine", contract := "hyperbola index preservation", validator := "algebraic proof" },
admissible := 80, -- Strong invariant: mass preservation is core property
residual := { uncertainty := 2, assumptions := 3, cost := 5 }, -- Moderate proof complexity
projection := { name := "linear projection", scaling := 256 }
}
/-- Mass number for zero_mass_iff_square theorem -/
def zeroMassIffSquareMass : PISTLogicalMass :=
{
field := { domain := "PIST state machine", contract := "square boundary invariants", validator := "algebraic proof" },
admissible := 75, -- Strong invariant: characterizes grounded phase
residual := { uncertainty := 3, assumptions := 3, cost := 7 }, -- Higher proof complexity
projection := { name := "linear projection", scaling := 256 }
}
/-- Demonstrate MNLOG-001: PIST theorems have field-local numerical valuations -/
#eval! mirrorPreservesMassMass.massNumber
-- Note: This valuation means "high admissibility under algebraic proof validator"
-- It does NOT mean "this theorem is universally true". Truth is proven by the theorem itself.
#eval! zeroMassIffSquareMass.massNumber
-- Note: This valuation means "moderate admissibility with higher proof cost"
-- Truth still requires the formal proof provided in the theorem.
end Semantics.PISTMachine