Pith Number

pith:7PFQRD4Q

pith:2018:7PFQRD4QINTUZWGW4WQO7WCG5R

not attested not anchored not stored refs pending

Chemical Heredity as Group Selection at the Molecular Level

Nathaniel Virgo, Olaf Witkowski, Omer Markovitch

arxiv:1802.08024 v1 · 2018-02-22 · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7PFQRD4QINTUZWGW4WQO7WCG5R}

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	2026-05-18T00:22:45.812167Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbcb088f9043674cd8d6e5a0efd846ec6f8eb862746348d318d79a4fbb213672

Aliases

arxiv: 1802.08024 · arxiv_version: 1802.08024v1 · doi: 10.48550/arxiv.1802.08024 · pith_short_12: 7PFQRD4QINTU · pith_short_16: 7PFQRD4QINTUZWGW · pith_short_8: 7PFQRD4Q

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/7PFQRD4QINTUZWGW4WQO7WCG5R \
  | 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: fbcb088f9043674cd8d6e5a0efd846ec6f8eb862746348d318d79a4fbb213672

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a807cc9b2d0a18850c61c49c14d182fbf8b9277ee5efda9216efb9b04ffa84f5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2018-02-22T13:07:36Z",
    "title_canon_sha256": "e72641a7623e6dd74ca7aff13673e0960426efa480eeb8ee9c6e3a949db8d183"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.08024",
    "kind": "arxiv",
    "version": 1
  }
}