Pith Number

pith:7QMFPGYH

pith:2011:7QMFPGYHJFW6ZRNBHBLAYLFNXK

not attested not anchored not stored refs pending

Interval Graphs with Containment Restrictions

Jeffrey Beyerl, Robert E. Jamison

arxiv:1109.6675 v1 · 2011-09-29 · 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{7QMFPGYHJFW6ZRNBHBLAYLFNXK}

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	2026-05-18T04:12:00.260606Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc18579b07496decc5a138560c2cadbab37b3a3819b36f673c8fc2ec52fbb11d

Aliases

arxiv: 1109.6675 · arxiv_version: 1109.6675v1 · doi: 10.48550/arxiv.1109.6675 · pith_short_12: 7QMFPGYHJFW6 · pith_short_16: 7QMFPGYHJFW6ZRNB · pith_short_8: 7QMFPGYH

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/7QMFPGYHJFW6ZRNBHBLAYLFNXK \
  | 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: fc18579b07496decc5a138560c2cadbab37b3a3819b36f673c8fc2ec52fbb11d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c193b6b5e292fc0fd78d4c13ecaa4600389fdee4b94b3d8939beefbc8e9d634c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-09-29T21:16:46Z",
    "title_canon_sha256": "dc9f5ecf5d66751ba5935bb99408b5970b19ece2ee0781626cf2f2a510a979cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6675",
    "kind": "arxiv",
    "version": 1
  }
}