Pith Number

pith:QGSJPBAJ

pith:2009:QGSJPBAJPRM6DAPFJPDHVMPWMI

not attested not anchored not stored refs pending

Sequence-Length Requirement of Distance-Based Phylogeny Reconstruction: Breaking the Polynomial Barrier

Sebastien Roch

arxiv:0908.2061 v1 · 2009-08-14 · math.PR · cs.CE · cs.DS · math.ST · q-bio.PE · q-bio.QM · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QGSJPBAJPRM6DAPFJPDHVMPWMI}

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	2026-05-18T04:12:02.464601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81a49784097c59e181e54bc67ab1f6620c88380f6a78002c06a970d7b8534250

Aliases

arxiv: 0908.2061 · arxiv_version: 0908.2061v1 · doi: 10.48550/arxiv.0908.2061 · pith_short_12: QGSJPBAJPRM6 · pith_short_16: QGSJPBAJPRM6DAPF · pith_short_8: QGSJPBAJ

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/QGSJPBAJPRM6DAPFJPDHVMPWMI \
  | 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: 81a49784097c59e181e54bc67ab1f6620c88380f6a78002c06a970d7b8534250

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "49351d60f15bfb708fedb7eea2f99ca27f4ab19ee2a8c6c96aeed2e0bdf98d18",
    "cross_cats_sorted": [
      "cs.CE",
      "cs.DS",
      "math.ST",
      "q-bio.PE",
      "q-bio.QM",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.PR",
    "submitted_at": "2009-08-14T13:20:44Z",
    "title_canon_sha256": "830332cf11fc858063760fcba6e181357c5d0be253e80b2ee6afb2a79bf492d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2061",
    "kind": "arxiv",
    "version": 1
  }
}