Pith Number

pith:P7OBCSY2

pith:1995:P7OBCSY2PW5M7PCUZIGEQUHE3X

not attested not anchored not stored refs pending

A model for evolution and extinction

Bruce W. Roberts, M. E. J. Newman (Cornell University)

arxiv:adap-org/9508001 v1 · 1995-08-08 · adap-org · nlin.AO · q-bio

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P7OBCSY2PW5M7PCUZIGEQUHE3X}

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	2026-07-04T15:07:59.620450Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fdc114b1a7dbacfbc54ca0c4850e4dddbabea36ad609ae3be2b8f8c2a1c379f

Aliases

arxiv: adap-org/9508001 · arxiv_version: adap-org/9508001v1 · doi: 10.48550/arxiv.adap-org/9508001 · pith_short_12: P7OBCSY2PW5M · pith_short_16: P7OBCSY2PW5M7PCU · pith_short_8: P7OBCSY2

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/P7OBCSY2PW5M7PCUZIGEQUHE3X \
  | 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: 7fdc114b1a7dbacfbc54ca0c4850e4dddbabea36ad609ae3be2b8f8c2a1c379f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec58bf8cee82f85e58dbc58e5c3522fea27f00485b03bf9de677a1039ef62678",
    "cross_cats_sorted": [
      "nlin.AO",
      "q-bio"
    ],
    "license": "",
    "primary_cat": "adap-org",
    "submitted_at": "1995-08-08T12:25:32Z",
    "title_canon_sha256": "490a69b27427003fc897945599506053a0a30b604db843fe3ea0a4d1c8e6b62d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "adap-org/9508001",
    "kind": "arxiv",
    "version": 1
  }
}