Pith Number

pith:HL3KXH2M

pith:2013:HL3KXH2M3GVY4UHCE77EGXY2F7

not attested not anchored not stored refs pending

Enumerating Markov Equivalence Classes of Acyclic Digraph Models

Michael D. Perlman, Steven B. Gillispie

arxiv:1301.2272 v1 · 2013-01-10 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HL3KXH2M3GVY4UHCE77EGXY2F7}

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	2026-05-18T03:36:45.699078Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3af6ab9f4cd9ab8e50e227fe435f1a2fd075c6412a5044ac8e02766576535772

Aliases

arxiv: 1301.2272 · arxiv_version: 1301.2272v1 · doi: 10.48550/arxiv.1301.2272 · pith_short_12: HL3KXH2M3GVY · pith_short_16: HL3KXH2M3GVY4UHC · pith_short_8: HL3KXH2M

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/HL3KXH2M3GVY4UHCE77EGXY2F7 \
  | 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: 3af6ab9f4cd9ab8e50e227fe435f1a2fd075c6412a5044ac8e02766576535772

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c41a06fe7678def09f9deb5001af4f2a4fb1fe25e61c06d8640f8334b556b2b5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2013-01-10T16:23:44Z",
    "title_canon_sha256": "fdbe966b7802cc58a9b33fd13c207f82a418f2002de6060c7b4bb92f141f2515"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.2272",
    "kind": "arxiv",
    "version": 1
  }
}