Pith Number

pith:5KNQO73P

pith:2015:5KNQO73PLUBA3HMEVWHBMKOSDN

not attested not anchored not stored refs pending

The tree machine

Arnaud Spiwack

arxiv:1507.04589 v1 · 2015-07-16 · 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{5KNQO73PLUBA3HMEVWHBMKOSDN}

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	2026-05-18T01:36:46.940784Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea9b077f6f5d020d9d84ad8e1629d21b780bef7bf91af54b2f55f9b1a2d985bb

Aliases

arxiv: 1507.04589 · arxiv_version: 1507.04589v1 · doi: 10.48550/arxiv.1507.04589 · pith_short_12: 5KNQO73PLUBA · pith_short_16: 5KNQO73PLUBA3HME · pith_short_8: 5KNQO73P

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/5KNQO73PLUBA3HMEVWHBMKOSDN \
  | 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: ea9b077f6f5d020d9d84ad8e1629d21b780bef7bf91af54b2f55f9b1a2d985bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a74a279630520863c6447d43badf67c286cb763999db677814f16772e5c6e441",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2015-07-16T14:17:54Z",
    "title_canon_sha256": "1d8f7c27d80389af13bd061cd6a5e9ee71d40e6c2cb31da7c655840db0f7ceac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04589",
    "kind": "arxiv",
    "version": 1
  }
}