Pith Number

pith:7UNEA4SF

pith:2013:7UNEA4SFZNVRD6QQZTQLVYNTKM

not attested not anchored not stored refs pending

A short note on exponential-time algorithms for hybridization number

Leen Stougie, Leo van Iersel, Nela Lekic, Steven Kelk

arxiv:1312.1255 v1 · 2013-12-04 · q-bio.PE · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7UNEA4SFZNVRD6QQZTQLVYNTKM}

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	2026-05-18T03:05:34.547536Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd1a407245cb6b11fa10cce0bae1b35317267da0e0b5b19625c4f0d6e0bef755

Aliases

arxiv: 1312.1255 · arxiv_version: 1312.1255v1 · doi: 10.48550/arxiv.1312.1255 · pith_short_12: 7UNEA4SFZNVR · pith_short_16: 7UNEA4SFZNVRD6QQ · pith_short_8: 7UNEA4SF

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/7UNEA4SFZNVRD6QQZTQLVYNTKM \
  | 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: fd1a407245cb6b11fa10cce0bae1b35317267da0e0b5b19625c4f0d6e0bef755

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb6dcb4b29c5fb31e879d0a424d948bb86633150609aa8272cfe678135988a44",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2013-12-04T17:37:37Z",
    "title_canon_sha256": "7c7bbd00b9d27b4cdcb54831d8678ffbd588a089f9f9a7fe9ecd8607c1b0184d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.1255",
    "kind": "arxiv",
    "version": 1
  }
}