Pith Number

pith:4UGCHWH4

pith:2013:4UGCHWH4WAEM2XQNYL4ITRMQPL

not attested not anchored not stored refs pending

Kernelization Using Structural Parameters on Sparse Graph Classes

Felix Reidl, Fernando S\'anchez Villaamil, Jakub Gajarsk\'y, Jan Obdr\v{z}\'alek, Peter Rossmanith, Petr Hlin\v{e}n\'y, Sebastian Ordyniak, Somnath Sikdar

arxiv:1302.6863 v3 · 2013-02-27 · 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{4UGCHWH4WAEM2XQNYL4ITRMQPL}

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	2026-05-18T01:09:50.077811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e50c23d8fcb008cd5e0dc2f889c5907ae78d9057237b271cfc3ed321c61bd3b3

Aliases

arxiv: 1302.6863 · arxiv_version: 1302.6863v3 · doi: 10.48550/arxiv.1302.6863 · pith_short_12: 4UGCHWH4WAEM · pith_short_16: 4UGCHWH4WAEM2XQN · pith_short_8: 4UGCHWH4

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/4UGCHWH4WAEM2XQNYL4ITRMQPL \
  | 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: e50c23d8fcb008cd5e0dc2f889c5907ae78d9057237b271cfc3ed321c61bd3b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4ef9462dc6af48cfb12576747acfa84708e2cf474c0d39576b0f84d05ae1e02",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-02-27T14:49:43Z",
    "title_canon_sha256": "9786ad68dece425e7f9a43b24008e4a5eb7d53427b3588aa86ba9826aba27946"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.6863",
    "kind": "arxiv",
    "version": 3
  }
}