Pith Number

pith:PO4JXSCU

pith:2011:PO4JXSCUOAVYGT2C5WI3JKQY27

not attested not anchored not stored refs pending

Subexponential Parameterized Algorithm for Minimum Fill-in

Fedor V. Fomin, Yngve Villanger

arxiv:1104.2230 v1 · 2011-04-12 · 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{PO4JXSCUOAVYGT2C5WI3JKQY27}

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	2026-05-18T04:24:35.704122Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bb89bc854702b834f42ed91b4aa18d7c7106ddd1eef732e5b6f8cba9193b666

Aliases

arxiv: 1104.2230 · arxiv_version: 1104.2230v1 · doi: 10.48550/arxiv.1104.2230 · pith_short_12: PO4JXSCUOAVY · pith_short_16: PO4JXSCUOAVYGT2C · pith_short_8: PO4JXSCU

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/PO4JXSCUOAVYGT2C5WI3JKQY27 \
  | 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: 7bb89bc854702b834f42ed91b4aa18d7c7106ddd1eef732e5b6f8cba9193b666

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b50711685fc43ccc25ba50b7a5552218fb4f11bb554254d62c7b63023123749",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-04-12T14:39:13Z",
    "title_canon_sha256": "a0bb83debb047d8d965d2d9b278bb3aca379f3d1d4986cc94206b0eac57f5935"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2230",
    "kind": "arxiv",
    "version": 1
  }
}