Pith Number

pith:QVLSWHKD

pith:2019:QVLSWHKD2HFDSGAEGDDZJWJYXV

not attested not anchored not stored refs pending

Gradients do grow on trees: a linear-time ${\cal O}\hspace{-0.2em}\left( N \right)$-dimensional gradient for statistical phylogenetics

Akihiko Nishimura, Andrew Holbrook, Andrew Rambaut, Guy Baele, Marc A. Suchard, Philippe Lemey, Xiang Ji, Zhenyu Zhang

arxiv:1905.12146 v1 · 2019-05-29 · stat.CO · q-bio.PE · stat.ME

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QVLSWHKD2HFDSGAEGDDZJWJYXV}

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	2026-05-17T23:44:48.812088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85572b1d43d1ca39180430c794d938bd607bb85b683159705669fd4f28552e37

Aliases

arxiv: 1905.12146 · arxiv_version: 1905.12146v1 · doi: 10.48550/arxiv.1905.12146 · pith_short_12: QVLSWHKD2HFD · pith_short_16: QVLSWHKD2HFDSGAE · pith_short_8: QVLSWHKD

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/QVLSWHKD2HFDSGAEGDDZJWJYXV \
  | 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: 85572b1d43d1ca39180430c794d938bd607bb85b683159705669fd4f28552e37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fac4eb2065006cc0e5bed9770a732675028cba7a29f6eece16f54cb74dae21d8",
    "cross_cats_sorted": [
      "q-bio.PE",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2019-05-29T00:33:42Z",
    "title_canon_sha256": "59f5c5fb111411a2545545e7a093c38a523779a6662f972eada3b40ad81e65f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.12146",
    "kind": "arxiv",
    "version": 1
  }
}