Pith Number

pith:ZTHB3UTF

pith:2013:ZTHB3UTFQCXN46UNTP4P3HN44A

not attested not anchored not stored refs pending

The min-max edge q-coloring problem

Alexandru Popa, Tommi Larjomaa

arxiv:1302.3404 v1 · 2013-02-14 · cs.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZTHB3UTFQCXN46UNTP4P3HN44A}

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	2026-05-18T03:33:39.023422Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccce1dd26580aede7a8d9bf8fd9dbce02cf237cb4aa6c4d9202e53f1e3366bed

Aliases

arxiv: 1302.3404 · arxiv_version: 1302.3404v1 · doi: 10.48550/arxiv.1302.3404 · pith_short_12: ZTHB3UTFQCXN · pith_short_16: ZTHB3UTFQCXN46UN · pith_short_8: ZTHB3UTF

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/ZTHB3UTFQCXN46UNTP4P3HN44A \
  | 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: ccce1dd26580aede7a8d9bf8fd9dbce02cf237cb4aa6c4d9202e53f1e3366bed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "675466ce6887722a7a1cc6fd6659b13da68b6db7e2bd30709408bc88fcbbf569",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-02-14T14:07:55Z",
    "title_canon_sha256": "75abee56843d64473dfb3f28ea19bffba4de9b856c2c9014c28b8e0bb5771fd6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.3404",
    "kind": "arxiv",
    "version": 1
  }
}