Elamur Groupantsmath-lean-boundary
The groupant beside math/src/lean.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.
Facts
Implementation material. A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.
Components
| component | label | where |
|---|---|---|
| approximant | partial | approximant |
| ast | partial | syntax.json |
| composition | partial | composition |
| descriptant | present | descriptant |
| invariant | partial | invariant |
| tests | partial bounded evidence | tests |
Obernants
The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.
| id | type | label | where |
|---|---|---|---|
behavior_complement | behavior_complement | partial source derived model | behavior_complement |
reverse_reconstruction | reverse_reconstruction | partial source derived model | reverse_reconstruction |
failure_precedence | failure_precedence | partial source derived model | failure_precedence |
representation_transport | representation_transport | partial source derived model | representation_transport |
resource_boundary | resource_boundary | partial source derived model | resource_boundary |
domain_boundary | domain_boundary | partial source derived model | domain_boundary |
Model text
descriptant
Source-bound description
assemble trims trailing := and indents proof lines. check scans case-sensitive banned substrings before filesystem, then writes sanitized-id/tag source and runs timeout lake env lean. Timeout124 and path-prefixed error/sorry blocks reject. parse_proofs emits completed ===id/end blocks; a new id discards unfinished prior block.
Epoch 2026-10-31: prospective model before bounded synthetic tests; production behavior unchanged. No Lean/teacher process; substring gate not complete semantic/security validation.
approximant
Forward relation
assemble trims trailing := and indents proof lines. check scans case-sensitive banned substrings before filesystem, then writes sanitized-id/tag source and runs timeout lake env lean. Timeout124 and path-prefixed error/sorry blocks reject. parse_proofs emits completed ===id/end blocks; a new id discards unfinished prior block.
Domain: Synthetic block parsing/assembly and preflight only. Unicode alphanumeric id allowed; tag unsanitized.
Executable Rust approximant unsupported: categorical/effect observations have no useful percentage metric yet. Future caps1/2/5/10% only; no automatic substitution.
invariant
Invariant and cost
Banned substring excludes file/process effects. External success with no recognized errors yields ok, not independently proven Lean validity here.
Ordering: Bans→write→process→timeout marker→diagnostic blocks→failure fallback.
Cost: O(proof bytes*bans+output bytes)+external Lean time; timeout depends on tool. Captured output uncapped, stored diagnostic blocks700chars.
composition
Composition and epoch memory
solve::run_lean uses first proof matching id; parser allows duplicates. Lean ok maps to verified and correct.
No Lean/teacher process; substring gate not complete semantic/security validation.
Partial syntax and finite tests do not establish all caller assumptions.
models
behavior_complement
Banned substring excludes file/process effects. External success with no recognized errors yields ok, not independently proven Lean validity here.
reverse_reconstruction
Parsed bodies admit discarded preamble/fences/incomplete blocks. Assembly loses whitespace. Ban rejection admits every body containing banned substring; absence does not establish proof validity.
failure_precedence
Bans→write→process→timeout marker→diagnostic blocks→failure fallback.
representation_transport
solve::run_lean uses first proof matching id; parser allows duplicates. Lean ok maps to verified and correct.
resource_boundary
O(proof bytes*bans+output bytes)+external Lean time; timeout depends on tool. Captured output uncapped, stored diagnostic blocks700chars.
domain_boundary
Synthetic block parsing/assembly and preflight only. Unicode alphanumeric id allowed; tag unsanitized.
tests
Evidence, 2026-10-31
Selected actual-source checks: cargo test -p math --lib lean::. Exact commands, numeric statuses, normalized outcomes, compiled assertion controls and restoration receipts are in the external wave28 mathcontrol run.
No Lean/teacher process; substring gate not complete semantic/security validation.
No live teacher/API, trained model, corpus/held-out, GPU, DB or expensive benchmark run. Parent syntax generated twice identically. Scope remains partial.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/math/src/lean.rs.groupant/