Pith Number

pith:WTISK3B6

pith:2013:WTISK3B6GQ2YKLCDLEOPKYRB7W

not attested not anchored not stored refs pending

Design Pattern-Based Extension of Class Hierarchies to Support Runtime Invariant Checks

John Cipriano, John Lasseter

arxiv:1301.4258 v1 · 2013-01-17 · cs.PL · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WTISK3B6GQ2YKLCDLEOPKYRB7W}

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	2026-05-18T03:36:05.774469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4d1256c3e3435852c43591cf56221fd94688dd914fe0f23e2a53a3d2765a4b7

Aliases

arxiv: 1301.4258 · arxiv_version: 1301.4258v1 · doi: 10.48550/arxiv.1301.4258 · pith_short_12: WTISK3B6GQ2Y · pith_short_16: WTISK3B6GQ2YKLCD · pith_short_8: WTISK3B6

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/WTISK3B6GQ2YKLCDLEOPKYRB7W \
  | 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: b4d1256c3e3435852c43591cf56221fd94688dd914fe0f23e2a53a3d2765a4b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d965803f171d049fd5e8f096112e1028a95590a41bf4021f2c6c8bae81cd36ca",
    "cross_cats_sorted": [
      "cs.SE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2013-01-17T22:12:36Z",
    "title_canon_sha256": "68ddd4bc0b8f537be2e008af54b643d8a9f9875289fa68d4bf6fcb3fc8fb7be2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.4258",
    "kind": "arxiv",
    "version": 1
  }
}