Pith Number

pith:IY33O5NV

pith:2014:IY33O5NVQFY6RWYOFFII5HYBEA

not attested not anchored not stored refs pending

Note on the upper bound of the rainbow index of a graph

Qingqiong Cai, Xueliang Li, Yan Zhao

arxiv:1407.4663 v2 · 2014-07-17 · 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{IY33O5NVQFY6RWYOFFII5HYBEA}

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	2026-05-18T02:47:06.951900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4637b775b58171e8db0e29508e9f01200e256b3382b085787acb571999020995

Aliases

arxiv: 1407.4663 · arxiv_version: 1407.4663v2 · doi: 10.48550/arxiv.1407.4663 · pith_short_12: IY33O5NVQFY6 · pith_short_16: IY33O5NVQFY6RWYO · pith_short_8: IY33O5NV

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/IY33O5NVQFY6RWYOFFII5HYBEA \
  | 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: 4637b775b58171e8db0e29508e9f01200e256b3382b085787acb571999020995

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "556e24ec9047edc84f483939971829275be33213e1f7bc797c1a3794f6d92316",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-07-17T13:24:51Z",
    "title_canon_sha256": "6634d2c8148ed1d4f0ac9e8581af0590f98e89eb71b2e57cafc7f22a1bb059ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.4663",
    "kind": "arxiv",
    "version": 2
  }
}