Pith Number

pith:WWMUS4M6

pith:2005:WWMUS4M6TK4OWZKUHIVQG3BLBX

not attested not anchored not stored refs pending

Simulation for competition of languages with an ageing sexual population

Veit Schw\"ammle

arxiv:physics/0503238 v1 · 2005-03-31 · physics.soc-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WWMUS4M6TK4OWZKUHIVQG3BLBX}

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	2026-05-18T01:38:07.813536Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b59949719e9ab8eb65543a2b036c2b0ddf03acc35d119c88f235c272e270788c

Aliases

arxiv: physics/0503238 · arxiv_version: physics/0503238v1 · doi: 10.48550/arxiv.physics/0503238 · pith_short_12: WWMUS4M6TK4O · pith_short_16: WWMUS4M6TK4OWZKU · pith_short_8: WWMUS4M6

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/WWMUS4M6TK4OWZKUHIVQG3BLBX \
  | 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: b59949719e9ab8eb65543a2b036c2b0ddf03acc35d119c88f235c272e270788c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e60c2fb7e6a2aa67f931a71ae1f38734285da542989b63f6e2314a87c9d6366",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2005-03-31T16:23:46Z",
    "title_canon_sha256": "fe449e94a97b87d7d932e19fcc8a89ba045615ed7e0438a3006107250a45bc9a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0503238",
    "kind": "arxiv",
    "version": 1
  }
}