Pith Number

pith:743HNEMH

pith:2009:743HNEMH4IJ7OXOYCZPD3HQLHM

not attested not anchored not stored refs pending

Combinatorial information distance

Joel Ratsaby

arxiv:0905.2386 v5 · 2009-05-14 · cs.DM · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{743HNEMH4IJ7OXOYCZPD3HQLHM}

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	2026-05-18T04:39:16.934360Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff36769187e213f75dd8165e3d9e0b3b0c62e0ebce614ac08cdcf5e4f049b373

Aliases

arxiv: 0905.2386 · arxiv_version: 0905.2386v5 · doi: 10.48550/arxiv.0905.2386 · pith_short_12: 743HNEMH4IJ7 · pith_short_16: 743HNEMH4IJ7OXOY · pith_short_8: 743HNEMH

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/743HNEMH4IJ7OXOYCZPD3HQLHM \
  | 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: ff36769187e213f75dd8165e3d9e0b3b0c62e0ebce614ac08cdcf5e4f049b373

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89a42e97318e964cd42445900726db78f2eba525341fff1ce7d3b43c9e8582b5",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2009-05-14T17:44:39Z",
    "title_canon_sha256": "02f4a03d8094c66b84d3a063c36f965a432187a75bd10967ee3a4478c2d7bb0e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2386",
    "kind": "arxiv",
    "version": 5
  }
}