Pith Number

pith:UXXPBDEL

pith:2013:UXXPBDELAJZEV22HYMDNF2HFSJ

not attested not anchored not stored refs pending

Deciding Morality of Graphs is NP-complete

Judea Pearl, Tom S. Verma

arxiv:1303.1501 v1 · 2013-03-06 · 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{UXXPBDELAJZEV22HYMDNF2HFSJ}

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	2026-05-18T03:31:42.516112Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5eef08c8b02724aeb47c306d2e8e5926cdf6f705b9408507192fd0285a9a9b2

Aliases

arxiv: 1303.1501 · arxiv_version: 1303.1501v1 · doi: 10.48550/arxiv.1303.1501 · pith_short_12: UXXPBDELAJZE · pith_short_16: UXXPBDELAJZEV22H · pith_short_8: UXXPBDEL

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/UXXPBDELAJZEV22HYMDNF2HFSJ \
  | 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: a5eef08c8b02724aeb47c306d2e8e5926cdf6f705b9408507192fd0285a9a9b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a55a7ea418f556ec8b3166ebaf9198eeaf87b50367330641c434ba266bc2e50",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2013-03-06T14:22:53Z",
    "title_canon_sha256": "373c080d6bfdafe375b31469ac3afeb1b6760037c7e4853ce2a6678f263f8383"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.1501",
    "kind": "arxiv",
    "version": 1
  }
}