Pith Number

pith:SOBARLOW

pith:2018:SOBARLOWKBESMG2EJZHZ6EGYYT

not attested not anchored not stored refs pending

Acyclic subgraphs with high chromatic number

Raphael Yuster, Safwat Nassar

arxiv:1811.05734 v1 · 2018-11-14 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SOBARLOWKBESMG2EJZHZ6EGYYT}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:00:42.204451Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

938208add65049261b444e4f9f10d8c4de03ddef0563c833eed8a30bd93cd802

Aliases

arxiv: 1811.05734 · arxiv_version: 1811.05734v1 · doi: 10.48550/arxiv.1811.05734 · pith_short_12: SOBARLOWKBES · pith_short_16: SOBARLOWKBESMG2E · pith_short_8: SOBARLOW

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/SOBARLOWKBESMG2EJZHZ6EGYYT \
  | 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: 938208add65049261b444e4f9f10d8c4de03ddef0563c833eed8a30bd93cd802

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afd553c928780a3f2a89bf329ec2399dea1af16fd1b49d6e3cb3ceaa6fa40ce8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-11-14T11:42:27Z",
    "title_canon_sha256": "a7f43109e370c74822a88cfd5fcd84f68323aa6b111d82c33e5ced92be9d34be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.05734",
    "kind": "arxiv",
    "version": 1
  }
}