Pith Number

pith:YLZOXSJM

pith:1997:YLZOXSJMJ4NR4HP7JEEDO4QOJO

not attested not anchored not stored refs pending

A Simple Model of Evolution with Variable System Size

C. Wilke, T. Martinetz (Ruhr-Universitaet Bochum)

arxiv:physics/9705008 v2 · 1997-05-07 · physics.bio-ph · adap-org · cond-mat.dis-nn · nlin.AO · physics.data-an · 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{YLZOXSJMJ4NR4HP7JEEDO4QOJO}

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	2026-05-18T01:05:17.282494Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2f2ebc92c4f1b1e1dff490837720e4bb307142bf833fd6ef37552a6ae972f63

Aliases

arxiv: physics/9705008 · arxiv_version: physics/9705008v2 · doi: 10.48550/arxiv.physics/9705008 · pith_short_12: YLZOXSJMJ4NR · pith_short_16: YLZOXSJMJ4NR4HP7 · pith_short_8: YLZOXSJM

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/YLZOXSJMJ4NR4HP7JEEDO4QOJO \
  | 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: c2f2ebc92c4f1b1e1dff490837720e4bb307142bf833fd6ef37552a6ae972f63

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6dd6c3c6f365fa54590b8da20849eaf5351e37879da65f4da32f063328aba451",
    "cross_cats_sorted": [
      "adap-org",
      "cond-mat.dis-nn",
      "nlin.AO",
      "physics.data-an",
      "q-bio"
    ],
    "license": "",
    "primary_cat": "physics.bio-ph",
    "submitted_at": "1997-05-07T10:07:24Z",
    "title_canon_sha256": "9b4717f8d43e5591a0e4d46658af23ff1798d64f7f8242603f7dcf025d9824cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/9705008",
    "kind": "arxiv",
    "version": 2
  }
}