Pith Number

pith:Y5JEFSXQ

pith:2011:Y5JEFSXQVZLHE7RWLEVEDUNPTT

not attested not anchored not stored refs pending

Fixed-Parameter and Approximation Algorithms for Maximum Agreement Forests

Chris Whidden, Norbert Zeh, Robert G. Beiko

arxiv:1108.2664 v2 · 2011-08-12 · q-bio.PE · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y5JEFSXQVZLHE7RWLEVEDUNPTT}

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	2026-05-18T02:21:41.962791Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c75242caf0ae56727e36592a41d1af9cfdcdbdecd2ce1f0f91301d1d44eefcee

Aliases

arxiv: 1108.2664 · arxiv_version: 1108.2664v2 · doi: 10.48550/arxiv.1108.2664 · pith_short_12: Y5JEFSXQVZLH · pith_short_16: Y5JEFSXQVZLHE7RW · pith_short_8: Y5JEFSXQ

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/Y5JEFSXQVZLHE7RWLEVEDUNPTT \
  | 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: c75242caf0ae56727e36592a41d1af9cfdcdbdecd2ce1f0f91301d1d44eefcee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "348e44313b1e631068c6280b12c7c2195166ee278f7793bbcab608598fef4870",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2011-08-12T17:20:39Z",
    "title_canon_sha256": "74425104620524bd8736739be0103452a7f60dace2db8dd9aa5cfda51f8f6263"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.2664",
    "kind": "arxiv",
    "version": 2
  }
}