Pith Number

pith:75PFUTQS

pith:2013:75PFUTQSHIWI7H7XMJJPE4GQVR

not attested not anchored not stored refs pending

Cophenetic metrics for phylogenetic trees, after Sokal and Rohlf

Arnau Mir, David Sanchez, Francesc Rossello, Gabriel Cardona, Lucia Rotger

arxiv:1301.4640 v1 · 2013-01-20 · 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{75PFUTQSHIWI7H7XMJJPE4GQVR}

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	2026-05-18T03:35:56.063478Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff5e5a4e123a2c8f9ff76252f270d0ac4dafb691708311a40427a023f0e7adb3

Aliases

arxiv: 1301.4640 · arxiv_version: 1301.4640v1 · doi: 10.48550/arxiv.1301.4640 · pith_short_12: 75PFUTQSHIWI · pith_short_16: 75PFUTQSHIWI7H7X · pith_short_8: 75PFUTQS

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/75PFUTQSHIWI7H7XMJJPE4GQVR \
  | 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: ff5e5a4e123a2c8f9ff76252f270d0ac4dafb691708311a40427a023f0e7adb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6dfbeea335ab7e4637414ee193ff19b9520bbe755099a1f306e67ffda0373739",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2013-01-20T09:07:58Z",
    "title_canon_sha256": "472d56298c83c9d2ac79729e10fbb8ce1b4457ac4756fccdecbf0bfbaa394f11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.4640",
    "kind": "arxiv",
    "version": 1
  }
}