Pith Number

pith:YFN3BPGA

pith:2013:YFN3BPGAIDIAKQWAHGHKTXDED2

not attested not anchored not stored refs pending

Coloring of a Digraph

E. Sampathkumar

arxiv:1304.0081 v1 · 2013-03-30 · 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{YFN3BPGAIDIAKQWAHGHKTXDED2}

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	2026-05-18T03:29:26.041011Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c15bb0bcc040d00542c0398ea9dc641e9359c7bf9e2c56b6efa32345ab08ce4d

Aliases

arxiv: 1304.0081 · arxiv_version: 1304.0081v1 · doi: 10.48550/arxiv.1304.0081 · pith_short_12: YFN3BPGAIDIA · pith_short_16: YFN3BPGAIDIAKQWA · pith_short_8: YFN3BPGA

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/YFN3BPGAIDIAKQWAHGHKTXDED2 \
  | 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: c15bb0bcc040d00542c0398ea9dc641e9359c7bf9e2c56b6efa32345ab08ce4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f653fb76a26a9f007e648dd9bc681536edef589b2d7c422482bf25d1eb20f094",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-03-30T10:06:37Z",
    "title_canon_sha256": "c198129842a239c530dd359620118437471afe3db90e24b5550481b126bd5b3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0081",
    "kind": "arxiv",
    "version": 1
  }
}