Pith Number

pith:NKPQ4ZKM

pith:2014:NKPQ4ZKMRNQ4QOJKXJG5UCX77H

not attested not anchored not stored refs pending

Partial list colouring of certain graphs

Deepak Rajendraprasad, Jeannette Janssen, Rogers Mathew

arxiv:1403.2587 v1 · 2014-03-11 · 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{NKPQ4ZKMRNQ4QOJKXJG5UCX77H}

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	2026-05-18T02:56:43.016102Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a9f0e654c8b61c8392aba4dda0afff9efd0e1968a52ed260e515a9dcde8dae0

Aliases

arxiv: 1403.2587 · arxiv_version: 1403.2587v1 · doi: 10.48550/arxiv.1403.2587 · pith_short_12: NKPQ4ZKMRNQ4 · pith_short_16: NKPQ4ZKMRNQ4QOJK · pith_short_8: NKPQ4ZKM

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/NKPQ4ZKMRNQ4QOJKXJG5UCX77H \
  | 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: 6a9f0e654c8b61c8392aba4dda0afff9efd0e1968a52ed260e515a9dcde8dae0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15976dc7b0a5ca921561beec399347c5d46c8089c2de9e8b10cd59599790db7a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-03-11T14:37:35Z",
    "title_canon_sha256": "ac136693cc107ccffce042f07f511f2f2f9a673ddb0307aa01229b9b5b7d347e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.2587",
    "kind": "arxiv",
    "version": 1
  }
}