Pith Number

pith:HRXBWH4W

pith:2017:HRXBWH4WBO42J55KRPGOSJMDZZ

not attested not anchored not stored refs pending

$\alpha$Check: A mechanized metatheory model-checker

Alberto Momigliano, James Cheney

arxiv:1704.00617 v1 · 2017-04-03 · cs.PL · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HRXBWH4WBO42J55KRPGOSJMDZZ}

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	2026-05-18T00:43:39.196340Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c6e1b1f960bb9a4f7aa8bcce92583ce7df10d05f46c08c0ac2c969ab019a3e1

Aliases

arxiv: 1704.00617 · arxiv_version: 1704.00617v1 · doi: 10.48550/arxiv.1704.00617 · pith_short_12: HRXBWH4WBO42 · pith_short_16: HRXBWH4WBO42J55K · pith_short_8: HRXBWH4W

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/HRXBWH4WBO42J55KRPGOSJMDZZ \
  | 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: 3c6e1b1f960bb9a4f7aa8bcce92583ce7df10d05f46c08c0ac2c969ab019a3e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ab3613d68f6be6c0dffe82a0e9db48c51bd3e5426f3b01ecdd58900ce26cf48",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2017-04-03T14:31:24Z",
    "title_canon_sha256": "7dbfdb9e0baf18d168f08f5d0f72dd1d5a32068e255774b1e65e422dfcf223af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.00617",
    "kind": "arxiv",
    "version": 1
  }
}