Pith Number

pith:YKQC7QHC

pith:2016:YKQC7QHC3EHDBH4DKQISEYU4WB

not attested not anchored not stored refs pending

Competition and extinction explain the evolution of diversity in American automobiles

Christopher Kelty, Daniele Silvestro, Erik Gjesfjeld, Jonathan Chang, Michael Alfaro

arxiv:1604.00055 v2 · 2016-03-31 · physics.soc-ph · q-bio.PE · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YKQC7QHC3EHDBH4DKQISEYU4WB}

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	2026-05-18T01:17:16.759207Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2a02fc0e2d90e309f83541122629cb04c413b8a106e213bfa4aa3bf51bb1d18

Aliases

arxiv: 1604.00055 · arxiv_version: 1604.00055v2 · doi: 10.48550/arxiv.1604.00055 · pith_short_12: YKQC7QHC3EHD · pith_short_16: YKQC7QHC3EHDBH4D · pith_short_8: YKQC7QHC

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/YKQC7QHC3EHDBH4DKQISEYU4WB \
  | 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: c2a02fc0e2d90e309f83541122629cb04c413b8a106e213bfa4aa3bf51bb1d18

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9ac8bbf00da0c048e09cf4a432b5c11c7ee3b2b1abc9466d102d1f50ba6430e",
    "cross_cats_sorted": [
      "q-bio.PE",
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2016-03-31T21:26:17Z",
    "title_canon_sha256": "5b5bfca73bb0dc23232b96288bb16c07754a2b25640a8c89715dfb1975bc1fd7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.00055",
    "kind": "arxiv",
    "version": 2
  }
}