Pith Number

pith:W4QJWMYJ

pith:2012:W4QJWMYJ2UOAB5JFSOTOVS4P5Y

not attested not anchored not stored refs pending

A Polynomial kernel for Proper Interval Vertex Deletion

Fedor V. Fomin, Saket Saurabh, Yngve Villanger

arxiv:1204.4880 v1 · 2012-04-22 · 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{W4QJWMYJ2UOAB5JFSOTOVS4P5Y}

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	2026-05-18T02:21:16.068026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7209b3309d51c00f52593a6eacb8fee30c0159f1d516e4246d658e39620a196

Aliases

arxiv: 1204.4880 · arxiv_version: 1204.4880v1 · doi: 10.48550/arxiv.1204.4880 · pith_short_12: W4QJWMYJ2UOA · pith_short_16: W4QJWMYJ2UOAB5JF · pith_short_8: W4QJWMYJ

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/W4QJWMYJ2UOAB5JFSOTOVS4P5Y \
  | 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: b7209b3309d51c00f52593a6eacb8fee30c0159f1d516e4246d658e39620a196

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5888d1262c9fcadd39c3d88922e7fc54a90a3b3f0d13b7e2d8df8c3e5a46f4be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-04-22T11:24:42Z",
    "title_canon_sha256": "5df2e15e2a7b2d7fc37eca4d264858dc40bc0a1336ab0f60dca4d039a6617a10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.4880",
    "kind": "arxiv",
    "version": 1
  }
}