Pith Number

pith:FDWI37AP

pith:2017:FDWI37APELLL7E4TT3KAVCARLY

not attested not anchored not stored refs pending

Cheryl's Birthday

Barteld Kooi, Hans van Ditmarsch, Jonathan Welton, Joseph B.W. Yeo, Michael Ian Hartley

arxiv:1708.02654 v1 · 2017-07-27 · cs.AI · cs.GL · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FDWI37APELLL7E4TT3KAVCARLY}

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	2026-05-18T00:38:20.043947Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28ec8dfc0f22d6bf93939ed40a88115e2b927fbf8113706bd4cd21a4d9ce7d7a

Aliases

arxiv: 1708.02654 · arxiv_version: 1708.02654v1 · doi: 10.48550/arxiv.1708.02654 · pith_short_12: FDWI37APELLL · pith_short_16: FDWI37APELLL7E4T · pith_short_8: FDWI37AP

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/FDWI37APELLL7E4TT3KAVCARLY \
  | 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: 28ec8dfc0f22d6bf93939ed40a88115e2b927fbf8113706bd4cd21a4d9ce7d7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c31a72516d5053be9cb5d2dc6347d9aba513cfbc3d24f96386dd7f6ad17adc40",
    "cross_cats_sorted": [
      "cs.GL",
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2017-07-27T07:44:49Z",
    "title_canon_sha256": "29288abbd71a56e71ea4c09d7bf5f20d3a24a4625235a55c8824c2d769c4014e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.02654",
    "kind": "arxiv",
    "version": 1
  }
}