Elamur Groupantsworld-induce-subset-counts
The groupant beside world/src/induce.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 |
| cost | partial | cost |
| descriptant | present | descriptant |
| invariant | partial | invariant |
| tests | partial bounded parent 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 |
reverse_reconstruction | reverse_reconstruction | partial source derived model | reverse_reconstruction |
world_induce_subset_counts_invariants | world_induce_subset_counts_invariants | partial source derived model | world_induce_subset_counts_invariants |
world_induce_subset_counts_resource_cost | world_induce_subset_counts_resource_cost | partial source derived model | world_induce_subset_counts_resource_cost |
world_induce_subset_counts_representation_join | world_induce_subset_counts_representation_join | partial source derived model | world_induce_subset_counts_representation_join |
world_induce_subset_counts_domain_partition | world_induce_subset_counts_domain_partition | partial source derived model | world_induce_subset_counts_domain_partition |
Model text
descriptant
world-induce-subset-counts
K(a,b,c)=a|(b<<21)|(c<<42), zero slots omitted. skeys emits C(A,1)+C(A,2)+C(A,3). add_fixes iff head=gold.head AND rel!=gold.rel; breaks iff both equal. Filter fix>=min, sort net desc, cardinality asc, Rule asc.
Modeling epoch 2026-10-31
Prospective source/branch/cost hypotheses were saved externally before source edits. This partial source-derived model retains observed boundaries rather than claiming complete verification. Pure codes/counting/parsing/changes/threshold tests; feature extraction, persistent effects and live learning remain partial, no surrogate.
approximant
Forward relation
K(a,b,c)=a|(b<<21)|(c<<42), zero slots omitted. skeys emits C(A,1)+C(A,2)+C(A,3). add_fixes iff head=gold.head AND rel!=gold.rel; breaks iff both equal. Filter fix>=min, sort net desc, cardinality asc, Rule asc.
Domain: Aligned shapes; valid internal feature f<32,v<65535; count/index width bounds.
No executable percent surrogate: these categorical/effect observations lack a useful approximation metric. Future supported caps1/2/5/10% need a defined domain/metric and real reference evidence; no error or speed bound is claimed.
invariant
Collision-free keys require nonzero21bit codes and<=3slots; input codes sorted unique. u32 decrement assumes balanced prior insertion; source does not check underflow balance.
Cost component: cost.md.
cost
Cubic subset work, G candidate sort and up to16 worker local maps/count vectors.
composition
CPU native test supplies features directly; GPU route re-encodes enum labels and offsets tou32, separate unexecuted claim.
models
behavior_complement
Four distinct atoms yield14 keys, excluding4-way subset. Wrong heads never counted. Same from/subset shares break count among all to targets; empty candidates return empty.
reverse_reconstruction
Decode valid packed key injectively recovers included codes, not full word feature vector. Count fiber includes arbitrary sentence order and incorrect-head words; cannot recover individual repair examples.
world_induce_subset_counts_invariants
Collision-free keys require nonzero21bit codes and<=3slots; input codes sorted unique. u32 decrement assumes balanced prior insertion; source does not check underflow balance.
world_induce_subset_counts_resource_cost
Cubic subset work, G candidate sort and up to16 worker local maps/count vectors.
world_induce_subset_counts_representation_join
CPU native test supplies features directly; GPU route re-encodes enum labels and offsets tou32, separate unexecuted claim.
world_induce_subset_counts_domain_partition
Aligned shapes; valid internal feature f<32,v<65535; count/index width bounds.
tests
Scoped evidence
Parent selected test names: ["induce::wave29_worldlearn::counting_requires_correct_heads_and_orders_candidates", "induce::wave29_worldlearn::packed_subsets_and_empty_bootstrap", "induce::wave29_worldlearn::permissive_parse_and_set_valued_changes"]. These finite tests touch only the named behaviors, not every statement in this fragment. See parent evidence. control-induce: compiled source mutation failed with exit101; source restored byte-for-byte and15positive tests passed.
Scope bytes [10798,19325) are bound to the shared parent syntax projection and full source hash. Pure codes/counting/parsing/changes/threshold tests; feature extraction, persistent effects and live learning remain partial, no surrogate.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/world/src/induce.rs.groupant/subset-counts.groupant/