Pith Number

pith:U2FDWXFE

pith:2014:U2FDWXFE3CYQKDJKF2ECQLKCLJ

not attested not anchored not stored refs pending

On Coupon Colorings of Graphs

Bob Chen, Jacques Verstraete, Jeong Han Kim, Michael Tait

arxiv:1404.6278 v1 · 2014-04-24 · 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{U2FDWXFE3CYQKDJKF2ECQLKCLJ}

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	2026-05-18T02:53:16.970517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a68a3b5ca4d8b1050d2a2e88282d425a4894468736559925a8da3262e03aa547

Aliases

arxiv: 1404.6278 · arxiv_version: 1404.6278v1 · doi: 10.48550/arxiv.1404.6278 · pith_short_12: U2FDWXFE3CYQ · pith_short_16: U2FDWXFE3CYQKDJK · pith_short_8: U2FDWXFE

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/U2FDWXFE3CYQKDJKF2ECQLKCLJ \
  | 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: a68a3b5ca4d8b1050d2a2e88282d425a4894468736559925a8da3262e03aa547

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6cd5f83f6e6682dc1996ec6a1b6eedf3e84eed2df5a05ae3d9ba8c78222aa76a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-04-24T21:45:43Z",
    "title_canon_sha256": "2c3cf7363365c26314e92a785332dfdf9e73623336dfe9cc1a02af174efdb7b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.6278",
    "kind": "arxiv",
    "version": 1
  }
}