Pith Number

pith:7O4FCRWP

pith:2015:7O4FCRWPYALQF4V2YOMX4V7E4K

not attested not anchored not stored refs pending

A scale-free method for testing the proportionality of branch lengths between two phylogenetic trees

Chinmaya Gupta, Dan Graur, William Ott, Yichen Zheng

arxiv:1503.04120 v1 · 2015-03-13 · q-bio.QM · 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{7O4FCRWPYALQF4V2YOMX4V7E4K}

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	2026-05-18T02:23:57.021933Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbb85146cfc01702f2bac3997e57e4e28d97d2b3cfc23afc23b023d31242f980

Aliases

arxiv: 1503.04120 · arxiv_version: 1503.04120v1 · doi: 10.48550/arxiv.1503.04120 · pith_short_12: 7O4FCRWPYALQ · pith_short_16: 7O4FCRWPYALQF4V2 · pith_short_8: 7O4FCRWP

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/7O4FCRWPYALQF4V2YOMX4V7E4K \
  | 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: fbb85146cfc01702f2bac3997e57e4e28d97d2b3cfc23afc23b023d31242f980

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11caef7e01e2e8bc907841b37cf525c3e0efe52feddf6dae36738344f4a0ada3",
    "cross_cats_sorted": [
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.QM",
    "submitted_at": "2015-03-13T15:58:06Z",
    "title_canon_sha256": "e4086ecf443f635fcf4bc6d53616a6810dd3e88e9327bb91c92ad57a87a67789"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.04120",
    "kind": "arxiv",
    "version": 1
  }
}