---
title: "math-solver-orchestration-memory-fallback — Mova code model"
description: "Mova code model of math/src/solve.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/math/src/solve.rs.groupant/memory-fallback.groupant/"
---
Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants**

This page as HTML: <https://groupants.elamur.ai/free/en/mova/math/src/solve.rs.groupant/memory-fallback.groupant/>

# math-solver-orchestration-memory-fallback

The groupant beside math/src/solve.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

- **kind:** groupant_fragment
- **status:** partial source bound model
- **source:** [`math/src/solve.rs`](https://github.com/ElamurAI/mova-free/blob/main/math/src/solve.rs)
- **source SHA-256:** `e6b60f9cdd4e36eb…`
- **covers:** Memos filter verified B then join Problem by id. C trains10epochs, filters same method/count/template/not own id, ranks skeleton and tries<=3. Multiple-choice requires unique computed numeric option. Verified candidate wins, else copy selected B fields with by_slm false. (bytes 9085–13850)
- **part of:** [math-solver-orchestration](https://md.groupants.elamur.ai/free/en/mova/math/src/solve.rs.groupant/)
- **repository folder:** [`math/src/solve.rs.groupant/memory-fallback.groupant`](https://github.com/ElamurAI/mova-free/tree/main/math/src/solve.rs.groupant/memory-fallback.groupant)
- **repository commit:** `48f2e6f74146`

> **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](#approximant) |
| **ast** | partial | `../syntax.json` |
| **composition** | partial | [composition](#composition) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant](#invariant) |
| **tests** | partial bounded evidence | [tests](#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](#behavior-complement) |
| `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |
| `failure_precedence` | failure_precedence | partial source derived model | [failure_precedence](#failure-precedence) |
| `representation_transport` | representation_transport | partial source derived model | [representation_transport](#representation-transport) |
| `resource_boundary` | resource_boundary | partial source derived model | [resource_boundary](#resource-boundary) |
| `domain_boundary` | domain_boundary | partial source derived model | [domain_boundary](#domain-boundary) |

## Model text


### descriptant

#### Source-bound description

Memos filter verified B then join Problem by id. C trains10epochs, filters same method/count/template/not own id, ranks skeleton and tries<=3. Multiple-choice requires unique computed numeric option. Verified candidate wins, else copy selected B fields with by_slm false.

Epoch 2026-10-31: prospective model before bounded synthetic tests; production behavior unchanged. Source scope bytes[9085,13850). Teacher/Lean loops and append-failure path unexecuted; no accuracy claim. Not every branch in this fragment executed.

### approximant

#### Forward relation

Memos filter verified B then join Problem by id. C trains10epochs, filters same method/count/template/not own id, ranks skeleton and tries<=3. Multiple-choice requires unique computed numeric option. Verified candidate wins, else copy selected B fields with by_slm false.

Domain: Synthetic bounded records and templates; finite similarity/margins. Equal similarity preserves memo order.

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

Missing Problem id excludes memo. Empty memory excludes by_slm success. No held split filter here; caller must enforce.

Ordering: Config/verified→id lookup→template; C margin→candidates→instantiate→option selection→gate→fallback.

Cost: Perceptron train+per-problem memory feature/skeleton work and<=3 plan runs (2 each with options). O(candidate list+records+weights).

### composition

#### Composition and epoch memory

Correct flag copied for reporting but does not control memo admission; internal gate distinct from grade.

Source scope bytes[9085,13850). Teacher/Lean loops and append-failure path unexecuted; no accuracy claim. Not every branch in this fragment executed.

Partial syntax and finite tests do not establish all caller assumptions.

### models

### behavior_complement

Missing Problem id excludes memo. Empty memory excludes by_slm success. No held split filter here; caller must enforce.

### reverse_reconstruction

Memo can derive from verified incorrect record. C fallback cannot reconstruct omitted history/trace/error; template success records donor id but not entire training sequence.

### failure_precedence

Config/verified→id lookup→template; C margin→candidates→instantiate→option selection→gate→fallback.

### representation_transport

Correct flag copied for reporting but does not control memo admission; internal gate distinct from grade.

### resource_boundary

Perceptron train+per-problem memory feature/skeleton work and<=3 plan runs (2 each with options). O(candidate list+records+weights).

### domain_boundary

Synthetic bounded records and templates; finite similarity/margins. Equal similarity preserves memo order.

### tests

#### Evidence, 2026-10-31

Selected actual-source checks: `cargo test -p math --lib solve::wave28`. Exact commands, numeric statuses, normalized outcomes, compiled assertion controls and restoration receipts are in the external wave28 mathcontrol run.

Source scope bytes[9085,13850). Teacher/Lean loops and append-failure path unexecuted; no accuracy claim. Not every branch in this fragment executed.

No live teacher/API, trained model, corpus/held-out, GPU, DB or expensive benchmark run. Parent syntax generated twice identically. Scope remains partial.