Pith Number

pith:OJE2NU37

pith:2013:OJE2NU37XPFXZXNP4SG4S6CQ2J

not attested not anchored not stored refs pending

Five Statistical Questions about the Tree of Life

David Aldous, Lea Popovic, Maxim Krikun

arxiv:1302.1440 v1 · 2013-02-06 · 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{OJE2NU37XPFXZXNP4SG4S6CQ2J}

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	2026-05-18T03:34:24.256982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7249a6d37fbbcb7cddafe48dc97850d26bd6192ce698f146d5eeff0f1cc8b857

Aliases

arxiv: 1302.1440 · arxiv_version: 1302.1440v1 · doi: 10.48550/arxiv.1302.1440 · pith_short_12: OJE2NU37XPFX · pith_short_16: OJE2NU37XPFXZXNP · pith_short_8: OJE2NU37

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/OJE2NU37XPFXZXNP4SG4S6CQ2J \
  | 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: 7249a6d37fbbcb7cddafe48dc97850d26bd6192ce698f146d5eeff0f1cc8b857

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5efa875ada916613419b06eeb8d117aa3b99035bf6e744e68dc8a507bef599c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2013-02-06T17:13:52Z",
    "title_canon_sha256": "28b88edf601282d0db30e76bd16861af97a8a2bb3a812a7bf0792cca4a75b2f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.1440",
    "kind": "arxiv",
    "version": 1
  }
}