Pith Number

pith:Q65KRZ3H

pith:2003:Q65KRZ3HD6773DX4YUGJR4DBSX

not attested not anchored not stored refs pending

From Philosophy to Program Size

G. J. Chaitin (IBM Research)

arxiv:math/0303352 v2 · 2003-03-27 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q65KRZ3HD6773DX4YUGJR4DBSX}

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	2026-07-04T14:37:10.788279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87baa8e7671fbffd8efcc50c98f06195e840afbd49e04dc09578b1dba9ca5f7f

Aliases

arxiv: math/0303352 · arxiv_version: math/0303352v2 · doi: 10.48550/arxiv.math/0303352 · pith_short_12: Q65KRZ3HD677 · pith_short_16: Q65KRZ3HD6773DX4 · pith_short_8: Q65KRZ3H

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/Q65KRZ3HD6773DX4YUGJR4DBSX \
  | 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: 87baa8e7671fbffd8efcc50c98f06195e840afbd49e04dc09578b1dba9ca5f7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "791a1019d7d44a61f309158b51ff3ec9bd671c35977f5d3f20e9ce2e0427df66",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.HO",
    "submitted_at": "2003-03-27T16:16:55Z",
    "title_canon_sha256": "3a82332482ce230f9185410290d9cf446756c346ea43cbed2f909a0288853da5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0303352",
    "kind": "arxiv",
    "version": 2
  }
}