Pith Number

pith:7ECGJ5GV

pith:2012:7ECGJ5GVN3CKOIKKAOKOZQYCZB

not attested not anchored not stored refs pending

The mean and variance of phylogenetic diversity under rarefaction

David A. Nipperess, Frederick A. Matsen IV

arxiv:1208.6552 v2 · 2012-08-31 · 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{7ECGJ5GVN3CKOIKKAOKOZQYCZB}

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	2026-05-18T02:20:50.704243Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f90464f4d56ec4a7214a0394ecc302c853111d5010977052cb6089ca1aad3b43

Aliases

arxiv: 1208.6552 · arxiv_version: 1208.6552v2 · doi: 10.48550/arxiv.1208.6552 · pith_short_12: 7ECGJ5GVN3CK · pith_short_16: 7ECGJ5GVN3CKOIKK · pith_short_8: 7ECGJ5GV

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/7ECGJ5GVN3CKOIKKAOKOZQYCZB \
  | 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: f90464f4d56ec4a7214a0394ecc302c853111d5010977052cb6089ca1aad3b43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7924ee06fb554559ea6526e6d8d1fcfd51abae1dbb6d1209fe691532de37d5d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2012-08-31T17:07:21Z",
    "title_canon_sha256": "9a7561b5f786f09b19a660b30e7ececa154702d8be805f2096db1ada0f32375e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.6552",
    "kind": "arxiv",
    "version": 2
  }
}