Pith Number

pith:2YPALLVN

pith:2017:2YPALLVNNZH4BCNBNPI6HAWDP2

not attested not anchored not stored refs pending

Rainbow vertex connection of digraphs

Henry Liu, Hui Lei, Shasha Li, Yongtang Shi

arxiv:1701.04280 v2 · 2017-01-16 · 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{2YPALLVNNZH4BCNBNPI6HAWDP2}

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	2026-05-18T00:40:13.414567Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d61e05aead6e4fc089a16bd1e382c37eb56f68afbec029ec6f5cc2fa13c61fb5

Aliases

arxiv: 1701.04280 · arxiv_version: 1701.04280v2 · doi: 10.48550/arxiv.1701.04280 · pith_short_12: 2YPALLVNNZH4 · pith_short_16: 2YPALLVNNZH4BCNB · pith_short_8: 2YPALLVN

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/2YPALLVNNZH4BCNBNPI6HAWDP2 \
  | 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: d61e05aead6e4fc089a16bd1e382c37eb56f68afbec029ec6f5cc2fa13c61fb5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98ed7321a8269126619857fec026fe57109a3f42cc70bd68a60ad9e14253c646",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-01-16T13:16:15Z",
    "title_canon_sha256": "bb830bbb73c6f1b69837885890921b4f7efe07f0c3dabae794bea74e72974239"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.04280",
    "kind": "arxiv",
    "version": 2
  }
}