Pith Number

pith:VRRZSQSO

pith:2011:VRRZSQSOST77BM4HKBBWQSH5RN

not attested not anchored not stored refs pending

Matroid Theory and Hrushovski's Predimension Construction

David M. Evans

arxiv:1105.3822 v1 · 2011-05-19 · math.LO · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRRZSQSOST77BM4HKBBWQSH5RN}

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

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	2026-05-18T04:21:51.283987Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac6399424e94fff0b38750436848fd8b5b27cea5cd842ac301be241cdf1b5cac

Aliases

arxiv: 1105.3822 · arxiv_version: 1105.3822v1 · doi: 10.48550/arxiv.1105.3822 · pith_short_12: VRRZSQSOST77 · pith_short_16: VRRZSQSOST77BM4H · pith_short_8: VRRZSQSO

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/VRRZSQSOST77BM4HKBBWQSH5RN \
  | 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: ac6399424e94fff0b38750436848fd8b5b27cea5cd842ac301be241cdf1b5cac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "01d7e2dab9b9962a4a364a046dd9b47138152d9fc9c902c5e4a8c4217301778c",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2011-05-19T09:32:55Z",
    "title_canon_sha256": "ab9881f336b9265bd7f0967d266eb30df7d2828f736c26b7d8b77ae02d88e520"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.3822",
    "kind": "arxiv",
    "version": 1
  }
}