Pith Number

pith:QUEGF2ME

pith:2019:QUEGF2MEBWYV5NOBRFGNATLE6Q

not attested not anchored not stored refs pending

A Practical Fixed-Parameter Algorithm for Constructing Tree-Child Networks from Multiple Binary Trees

Leo van Iersel, Mark Jones, Norbert Zeh, Remie Janssen, Yukihiro Murakami

arxiv:1907.08474 v1 · 2019-07-19 · cs.DM · math.CO · 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{QUEGF2MEBWYV5NOBRFGNATLE6Q}

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	2026-05-17T23:40:09.736411Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

850862e9840db15eb5c1894cd04d64f41b413003d7e1b75f24072d3f0ae27de2

Aliases

arxiv: 1907.08474 · arxiv_version: 1907.08474v1 · doi: 10.48550/arxiv.1907.08474 · pith_short_12: QUEGF2MEBWYV · pith_short_16: QUEGF2MEBWYV5NOB · pith_short_8: QUEGF2ME

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/QUEGF2MEBWYV5NOBRFGNATLE6Q \
  | 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: 850862e9840db15eb5c1894cd04d64f41b413003d7e1b75f24072d3f0ae27de2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "600ea8d33b4e3fba2b18e0f0d8400da42faaaa7b2c9429fe4a274bdeb1fedc72",
    "cross_cats_sorted": [
      "math.CO",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2019-07-19T11:55:15Z",
    "title_canon_sha256": "2b4fd87cccef780511c06f091d1ca4eef40f0d7fe8afca74a50f8ad5d167dc6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.08474",
    "kind": "arxiv",
    "version": 1
  }
}