Pith Number

pith:7GSUW4NN

pith:2011:7GSUW4NNMJZBUPQLKGIQ3YXNL6

not attested not anchored not stored refs pending

Edge principal components and squash clustering: using the special structure of phylogenetic placement data for sample comparison

Frederick A. Matsen, Steven N. Evans

arxiv:1107.5095 v1 · 2011-07-25 · 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{7GSUW4NNMJZBUPQLKGIQ3YXNL6}

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	2026-05-18T04:16:53.055646Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9a54b71ad62721a3e0b51910de2ed5f9b00e30c6f45de55271fcc2ad0340ba6

Aliases

arxiv: 1107.5095 · arxiv_version: 1107.5095v1 · doi: 10.48550/arxiv.1107.5095 · pith_short_12: 7GSUW4NNMJZB · pith_short_16: 7GSUW4NNMJZBUPQL · pith_short_8: 7GSUW4NN

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/7GSUW4NNMJZBUPQLKGIQ3YXNL6 \
  | 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: f9a54b71ad62721a3e0b51910de2ed5f9b00e30c6f45de55271fcc2ad0340ba6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a9be5b435f1ef556719a19efd97af440c80cf7e16a172c705a48958007a5fd7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2011-07-25T23:39:25Z",
    "title_canon_sha256": "60f0c71d0644a75277a298eff13d471fdc81144d6eb608024138bbdbeecd6ee1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.5095",
    "kind": "arxiv",
    "version": 1
  }
}