Pith Number

pith:7COTWR2E

pith:2015:7COTWR2E3JT5LU5CEKKTD4SNBI

not attested not anchored not stored refs pending

On the chromatic number of Latin square graphs

E.S. Mahmoodian, Luis Goddyn, M. Mortezaeefar, Nazli Besharati

arxiv:1510.02521 v2 · 2015-10-08 · 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{7COTWR2E3JT5LU5CEKKTD4SNBI}

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	2026-05-18T01:01:01.046403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f89d3b4744da67d5d3a2229531f24d0a08bae3acb5f96e40111a4aea4130f50c

Aliases

arxiv: 1510.02521 · arxiv_version: 1510.02521v2 · doi: 10.48550/arxiv.1510.02521 · pith_short_12: 7COTWR2E3JT5 · pith_short_16: 7COTWR2E3JT5LU5C · pith_short_8: 7COTWR2E

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/7COTWR2E3JT5LU5CEKKTD4SNBI \
  | 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: f89d3b4744da67d5d3a2229531f24d0a08bae3acb5f96e40111a4aea4130f50c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5a6abcea247e523f6f892aabd1859bc12a40480e335ad5ca8bcaa0e5353c40e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-10-08T22:07:10Z",
    "title_canon_sha256": "ed77bbf022c90c879f654f1e33f0c5297a8ae1252c23856cc7bebcd0bd4d0760"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.02521",
    "kind": "arxiv",
    "version": 2
  }
}