Files
proofs/lean/AI/Embedding.lean
zooqueenandHanzo Dev d3bff5e2dc proofs: drive Lean library to 0 errors, eliminate proof-by-assumption axioms
The lean/ proof library (88 files) had ~180 type-check errors across ~45 files
plus 31 proof-by-assumption axiom cheats. It now type-checks cleanly under
Lean 4.14.0 + Mathlib, with every theorem genuinely proven from definitions.

Errors fixed:
- Stale Mathlib imports: Data.Nat.Basic / Data.Int.Basic were removed this rev
  -> Data.Nat.Defs / Data.Int.Defs (57 files).
- Shared AI/Agent/Governance/Contract/DeFi/Ecology draft files: same proof-rot
  as the zoo-labs sibling library (now reconciled): omega missing in-scope
  bounds, dead tactics after simp, simp over-reduction, doc-comment placement,
  reserved-word binders, deriving Repr on Finset-bearing structs, noncomputable
  defs over opaque primitives.
- Consensus/Liveness: collapsed a 74-error cascade (undefined shared state model
  inlined from Safety.lean; the |>. pipe-projection vs comparison parse trap on
  14 lines rewritten to explicit dot projection).
- Crypto (BLS/FROST/Corona/Hybrid/threshold/FHE), Consensus, Protocol, Warp,
  Trust, GPU, Compute, Network, DeFi: brought structure invariants into scope
  for omega, Nat-division bounds via Nat.div_le_of_le_mul / Nat.div_mul_le_self,
  noncomputable over opaque crypto ops, deriving Inhabited for index access.

Integrity:
- Removed all 31 `theorem X := X_ax` cheats (axiom asserting the identical
  statement) and proved each from definitions; removed the UNSOUND
  content_addressed axiom (hash-injectivity over a struct with free fields).
- Quorum-intersection theorems (BFT/Quasar/Flare/Warp/BLS/GPU/Bridge): the draft
  hypothesis 3f<n is insufficient (n unbounded above makes them false); tightened
  to the optimal-resilience invariant n=3f+1 / 2t>n. Statement intent preserved.
- Net axiom change: -35 / +1 (the one addition, honesty_static, is a
  fixed-validator-set modeling assumption matching sibling files).
- Remaining axioms are trusted-base only: opaque crypto primitives (groups,
  pairings, hardness, hashes, FHE encrypt/decrypt, BLS soundness, forward
  secrecy, Fisher-Yates uniformity) and protocol modeling assumptions. No
  sorry/admit/native_decide. Verified all theorems trace to
  [propext, Classical.choice, Quot.sound] plus those primitives.

Co-authored-by: Hanzo Dev <[email protected]>
2026-06-02 05:54:28 -07:00

70 lines
2.1 KiB
Lean4

/-
Authors: Antje Worring, Zach Kelling
Embedding Correctness (7680-dimensional)
Vector embeddings for semantic search and RAG.
Zoo uses 7680-dimensional embeddings for maximum resolution.
Maps to:
- zoo/papers/embedding-7680.tex: embedding specification
- hanzo/engine: embedding inference
- zoo/node: embedding storage
Properties:
- Dimensionality: 7680 dimensions (highest resolution)
- Normalization: unit-length vectors for cosine similarity
- Determinism: same input → same embedding
- Batching: batch embeddings preserve individual results
Author: Zach Kelling
-/
import Mathlib.Data.Nat.Defs
import Mathlib.Data.List.Basic
import Mathlib.Tactic
namespace AI.Embedding
def standardDim : Nat := 7680
structure EmbeddingVector where
dim : Nat
hash : Nat -- content hash of the vector
normalized : Bool -- unit length for cosine sim
axiom embed : Nat → EmbeddingVector
axiom embed_deterministic : ∀ (input : Nat), embed input = embed input
/-- DIMENSIONALITY: Standard embedding is 7680-dim -/
axiom embed_dim : ∀ (input : Nat), (embed input).dim = standardDim
theorem dim_is_7680 : standardDim = 7680 := rfl
/-- NORMALIZATION: Embeddings are unit-length -/
axiom embed_normalized : ∀ (input : Nat), (embed input).normalized = true
/-- DETERMINISM: Same input always produces same vector -/
theorem deterministic (input : Nat) :
embed input = embed input := rfl
/-- BATCH: Batch embedding = individual embeddings -/
noncomputable def batchEmbed (inputs : List Nat) : List EmbeddingVector :=
inputs.map embed
theorem batch_length (inputs : List Nat) :
(batchEmbed inputs).length = inputs.length := by
simp [batchEmbed]
theorem batch_preserves (inputs : List Nat) (i : Fin inputs.length) :
(batchEmbed inputs)[i]'(by simp [batchEmbed, i.isLt]) = embed inputs[i] := by
simp [batchEmbed, List.getElem_map]
/-- 7680 > 1536 (OpenAI ada-002) -/
theorem higher_resolution : standardDim > 1536 := by simp [standardDim]
/-- 7680 > 3072 (OpenAI text-embedding-3-large) -/
theorem higher_than_openai : standardDim > 3072 := by simp [standardDim]
end AI.Embedding