Pith Number

pith:OQHMEYKV

pith:2012:OQHMEYKVJJIV6JPZPC7KWJMYVC

not attested not anchored not stored refs pending

Parametric matroid of rough set

William Zhu, Yanfang Liu

arxiv:1209.4975 v1 · 2012-09-22 · cs.AI · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OQHMEYKVJJIV6JPZPC7KWJMYVC}

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	2026-05-18T03:44:59.555007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

740ec261554a515f25f978beab2598a8b50b2281148257488c6dd9c20fc919c8

Aliases

arxiv: 1209.4975 · arxiv_version: 1209.4975v1 · doi: 10.48550/arxiv.1209.4975 · pith_short_12: OQHMEYKVJJIV · pith_short_16: OQHMEYKVJJIV6JPZ · pith_short_8: OQHMEYKV

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/OQHMEYKVJJIV6JPZPC7KWJMYVC \
  | 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: 740ec261554a515f25f978beab2598a8b50b2281148257488c6dd9c20fc919c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d76d3188fdfaf5b17df3e48151170620325595a139d5b2ef6fbb55e6a19078f4",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2012-09-22T09:19:54Z",
    "title_canon_sha256": "36439d7523f443e7822a300935dcf706025aff4185b9d845ac17f5506119dcb6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4975",
    "kind": "arxiv",
    "version": 1
  }
}