Pith Number

pith:UR2S36EA

pith:2011:UR2S36EAPBQEHYQ2BI32KIZ4MY

not attested not anchored not stored refs pending

ATP and Presentation Service for Mizar Formalizations

Geoff Sutcliffe, Josef Urban, Piotr Rudnicki

arxiv:1109.0616 v2 · 2011-09-03 · cs.DL · 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{UR2S36EAPBQEHYQ2BI32KIZ4MY}

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	2026-05-18T03:43:42.492346Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4752df880786043e21a0a37a5233c661014ec63e6454615c162e637a8340ccc

Aliases

arxiv: 1109.0616 · arxiv_version: 1109.0616v2 · doi: 10.48550/arxiv.1109.0616 · pith_short_12: UR2S36EAPBQE · pith_short_16: UR2S36EAPBQEHYQ2 · pith_short_8: UR2S36EA

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/UR2S36EAPBQEHYQ2BI32KIZ4MY \
  | 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: a4752df880786043e21a0a37a5233c661014ec63e6454615c162e637a8340ccc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "16b40153e7d1c8de06a95f5f3007037e123672bc0b4265ac6cbdf4bd388d183c",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2011-09-03T11:42:52Z",
    "title_canon_sha256": "b5e70a4ed02a381c7c4ca421f5883e3072b0cd2562c1949909361655a54cc441"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.0616",
    "kind": "arxiv",
    "version": 2
  }
}