Pith Number

pith:6B2KS4P7

pith:2014:6B2KS4P72S6GL4QJNQ4E66MGCM

not attested not anchored not stored refs pending

Tree-depth and Vertex-minors

Jan Obdr\v{z}\'alek, O-joung Kwon, Petr Hlin\v{e}n\'y, Sebastian Ordyniak

arxiv:1403.7024 v1 · 2014-03-27 · cs.DM · 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{6B2KS4P72S6GL4QJNQ4E66MGCM}

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	2026-05-18T02:55:26.690910Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f074a971ffd4bc65f2096c384f7986130690558e8f54f22e169278b8d3ad548c

Aliases

arxiv: 1403.7024 · arxiv_version: 1403.7024v1 · doi: 10.48550/arxiv.1403.7024 · pith_short_12: 6B2KS4P72S6G · pith_short_16: 6B2KS4P72S6GL4QJ · pith_short_8: 6B2KS4P7

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/6B2KS4P72S6GL4QJNQ4E66MGCM \
  | 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: f074a971ffd4bc65f2096c384f7986130690558e8f54f22e169278b8d3ad548c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4991b27ccd2957ffe9df5e2d9cc611bbbbb297ae5842b09375f324da99fbff0",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2014-03-27T13:41:28Z",
    "title_canon_sha256": "cd099c8498500501b97f578919332955e10acc92c09caeee03195d8915cf2626"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.7024",
    "kind": "arxiv",
    "version": 1
  }
}