Pith Number

pith:DRELA3MW

pith:2017:DRELA3MWQSN3HVMTZ3F3SFKBO6

not attested not anchored not stored refs pending

The Hadwiger number, chordal graphs and $ab$-perfection

Christian Rubio-Montiel

arxiv:1701.08417 v1 · 2017-01-29 · 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{DRELA3MWQSN3HVMTZ3F3SFKBO6}

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	2026-05-18T00:04:24.204098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c48b06d96849bb3d593cecbb9154177a2f45d5ee2965a8bd73c3d6b86d096a3

Aliases

arxiv: 1701.08417 · arxiv_version: 1701.08417v1 · doi: 10.48550/arxiv.1701.08417 · pith_short_12: DRELA3MWQSN3 · pith_short_16: DRELA3MWQSN3HVMT · pith_short_8: DRELA3MW

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/DRELA3MWQSN3HVMTZ3F3SFKBO6 \
  | 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: 1c48b06d96849bb3d593cecbb9154177a2f45d5ee2965a8bd73c3d6b86d096a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "632510c3c44320eb680f55657ef06be5e58883836d40229cfdc5f3c5c75e495b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-01-29T19:04:55Z",
    "title_canon_sha256": "c813753ffd4ef55fbac3a225543884346ff181846fb65d8e02e2e8cf4eefcb0b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.08417",
    "kind": "arxiv",
    "version": 1
  }
}