Pith Number

pith:UEA7QVJV

pith:2012:UEA7QVJVALXHBSKS733CIX5B4I

not attested not anchored not stored refs pending

b-coloring graphs with large girth

Ana Silva, Victor Campos, Victor Farias

arxiv:1202.4032 v1 · 2012-02-17 · 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{UEA7QVJVALXHBSKS733CIX5B4I}

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	2026-05-18T04:02:01.506521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a101f8553502ee70c952fef6245fa1e2137465a2bfe2036b209f65d54093536e

Aliases

arxiv: 1202.4032 · arxiv_version: 1202.4032v1 · doi: 10.48550/arxiv.1202.4032 · pith_short_12: UEA7QVJVALXH · pith_short_16: UEA7QVJVALXHBSKS · pith_short_8: UEA7QVJV

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/UEA7QVJVALXHBSKS733CIX5B4I \
  | 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: a101f8553502ee70c952fef6245fa1e2137465a2bfe2036b209f65d54093536e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c942035e7c0d5ff0d82876db5388eb6b118ff6816dada713832873dc543b7d49",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-02-17T22:38:19Z",
    "title_canon_sha256": "0f785f72599b04bb692e39fd0932c9432492f21220f752f7ee3ccd7c31aec2e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4032",
    "kind": "arxiv",
    "version": 1
  }
}