Pith Number

pith:GFFJH24Z

pith:2018:GFFJH24ZKXHC3RAIWCNCZHMQZP

not attested not anchored not stored refs pending

Cographs: Eigenvalues and Dilworth Number

Ebrahim Ghorbani

arxiv:1803.00246 v2 · 2018-03-01 · 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{GFFJH24ZKXHC3RAIWCNCZHMQZP}

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	2026-05-18T00:10:22.015742Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

314a93eb9955ce2dc408b09a2c9d90cbc0e81297a1d16647e92c53e8b9cde45e

Aliases

arxiv: 1803.00246 · arxiv_version: 1803.00246v2 · doi: 10.48550/arxiv.1803.00246 · pith_short_12: GFFJH24ZKXHC · pith_short_16: GFFJH24ZKXHC3RAI · pith_short_8: GFFJH24Z

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/GFFJH24ZKXHC3RAIWCNCZHMQZP \
  | 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: 314a93eb9955ce2dc408b09a2c9d90cbc0e81297a1d16647e92c53e8b9cde45e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "439024b0237d66acf63542f588d71a298963a5fb68d8e50de38b8cb32ddd0d99",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-03-01T08:35:49Z",
    "title_canon_sha256": "2280543cd5de7b1346950aa710dc7771af4a2886e4a5c340aa7ef2fd7ec9ce3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.00246",
    "kind": "arxiv",
    "version": 2
  }
}