Pith Number

pith:56DEILKE

pith:2011:56DEILKECHN4ZAQYGF7S2J3TL4

not attested not anchored not stored refs pending

Unifying Class-Based Representation Formalisms

D. Calvanese, D. Nardi, M. Lenzerini

arxiv:1105.5452 v1 · 2011-05-27 · 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{56DEILKECHN4ZAQYGF7S2J3TL4}

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	2026-05-18T04:21:11.729306Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef86442d4411dbcc8218317f2d27735f09b5bc2f838e56379693e93fbfc20fdb

Aliases

arxiv: 1105.5452 · arxiv_version: 1105.5452v1 · doi: 10.48550/arxiv.1105.5452 · pith_short_12: 56DEILKECHN4 · pith_short_16: 56DEILKECHN4ZAQY · pith_short_8: 56DEILKE

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/56DEILKECHN4ZAQYGF7S2J3TL4 \
  | 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: ef86442d4411dbcc8218317f2d27735f09b5bc2f838e56379693e93fbfc20fdb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1eab2550a4c397235f87de3eeded0b1d4e5f5d359fd49fe16e972b31fa6104c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2011-05-27T01:49:59Z",
    "title_canon_sha256": "ca2aacbe39d2325d4f44ee9d12352d13b689ac8e6979fbd3a7cffd26a4120596"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.5452",
    "kind": "arxiv",
    "version": 1
  }
}