Pith Number

pith:P527WL4E

pith:2019:P527WL4EGSQHZDH2ZIADT46QFH

not attested not anchored not stored refs pending

Integral cographs and applications

Fernando Tura, Luiz Emilio Allem

arxiv:1902.06817 v1 · 2019-02-18 · 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{P527WL4EGSQHZDH2ZIADT46QFH}

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	2026-05-17T23:53:40.717778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f75fb2f8434a07c8cfaca0039f3d029f02c9ebf0e938021d7caf48f0aa3187b

Aliases

arxiv: 1902.06817 · arxiv_version: 1902.06817v1 · doi: 10.48550/arxiv.1902.06817 · pith_short_12: P527WL4EGSQH · pith_short_16: P527WL4EGSQHZDH2 · pith_short_8: P527WL4E

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/P527WL4EGSQHZDH2ZIADT46QFH \
  | 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: 7f75fb2f8434a07c8cfaca0039f3d029f02c9ebf0e938021d7caf48f0aa3187b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88a1bb63d1c035a8068bdd02a409f233f248586d090c9873730cfbcdef8b1157",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-02-18T22:07:49Z",
    "title_canon_sha256": "6a72cb202211b33ca48e820a67bd27aeaf6ecb13e5dc73b297ae75137c3a97c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06817",
    "kind": "arxiv",
    "version": 1
  }
}