Pith Number

pith:3JTWDIKY

pith:2009:3JTWDIKYAOK3AHGIWBK3ZRT32B

not attested not anchored not stored refs pending

PrisCrawler: A Relevance Based Crawler for Automated Data Classification from Bulletin Board

Jun Guo, Pu Yang, Weiran Xu

arxiv:0909.2489 v1 · 2009-09-14 · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3JTWDIKYAOK3AHGIWBK3ZRT32B}

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	2026-05-18T00:58:47.946547Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da6761a1580395b01cc8b055bcc67bd04f01e0e01699d22320fd1e59f7208154

Aliases

arxiv: 0909.2489 · arxiv_version: 0909.2489v1 · doi: 10.48550/arxiv.0909.2489 · pith_short_12: 3JTWDIKYAOK3 · pith_short_16: 3JTWDIKYAOK3AHGI · pith_short_8: 3JTWDIKY

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/3JTWDIKYAOK3AHGIWBK3ZRT32B \
  | 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: da6761a1580395b01cc8b055bcc67bd04f01e0e01699d22320fd1e59f7208154

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "721d48b63c4fadd8f4bc8813ef920b777132e7410d1a5136d19034695b8dc828",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2009-09-14T09:02:01Z",
    "title_canon_sha256": "96e128fb812ce19c5c4c16fbd5464ea372c55902c2cc0ad1e2d9c18599ba77ab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2489",
    "kind": "arxiv",
    "version": 1
  }
}