Pith Number

pith:WEXHCBRZ

pith:2011:WEXHCBRZNS5D5AP4EUCCUPSMBL

not attested not anchored not stored refs pending

The geometry of Hrushovski constructions, I. The uncollapsed case

David M. Evans, Marco S. Ferreira

arxiv:1103.3638 v1 · 2011-03-18 · math.LO

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WEXHCBRZNS5D5AP4EUCCUPSMBL}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T04:26:32.232658Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b12e7106396cba3e81fc25042a3e4c0aca20ec2564e9bf50a6c9de7cf8e1d917

Aliases

arxiv: 1103.3638 · arxiv_version: 1103.3638v1 · doi: 10.48550/arxiv.1103.3638 · pith_short_12: WEXHCBRZNS5D · pith_short_16: WEXHCBRZNS5D5AP4 · pith_short_8: WEXHCBRZ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/WEXHCBRZNS5D5AP4EUCCUPSMBL \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b12e7106396cba3e81fc25042a3e4c0aca20ec2564e9bf50a6c9de7cf8e1d917

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25c09fecbba7e8f14fc358d078ee3e4166b599957e5d22ff6bc212c6c447e6d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2011-03-18T14:50:57Z",
    "title_canon_sha256": "8173d3514d84c88365da46587af0b43f82ce2d9f754a15e4330ce53b69e56919"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.3638",
    "kind": "arxiv",
    "version": 1
  }
}