Pith Number

pith:7QLU2EFY

pith:2011:7QLU2EFYLNHYF7UCSLHVNBI5AP

not attested not anchored not stored refs pending

Generalized Post Embedding Problems

Philippe Schnoebelen, Prateek Karandikar

arxiv:1109.1691 v4 · 2011-09-08 · cs.LO · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7QLU2EFYLNHYF7UCSLHVNBI5AP}

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	2026-05-18T01:11:27.744258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc174d10b85b4f82fe8292cf56851d03ec3d6823345c0d76c689577041cac653

Aliases

arxiv: 1109.1691 · arxiv_version: 1109.1691v4 · doi: 10.48550/arxiv.1109.1691 · pith_short_12: 7QLU2EFYLNHY · pith_short_16: 7QLU2EFYLNHYF7UC · pith_short_8: 7QLU2EFY

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/7QLU2EFYLNHYF7UCSLHVNBI5AP \
  | 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: fc174d10b85b4f82fe8292cf56851d03ec3d6823345c0d76c689577041cac653

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9739479e86465f717eb00d9f305fe2310883bcf1fca5118f77271719afc14482",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2011-09-08T11:28:37Z",
    "title_canon_sha256": "3e66a44c86ae91b803937acc8f86f61232224713f6c8e6ad0f73e6a2664c85d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.1691",
    "kind": "arxiv",
    "version": 4
  }
}