Pith Number

pith:DHHPEULB

pith:2009:DHHPEULBNYPUG2MEUY4BJGA7LU

not attested not anchored not stored refs pending

Modeling System Safety Requirements Using Input/Output Constraint Meta-Automata

Gilles Motet, Zhe Chen

arxiv:0905.2355 v1 · 2009-05-14 · cs.SE · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DHHPEULBNYPUG2MEUY4BJGA7LU}

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	2026-05-18T00:58:20.185939Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19cef251616e1f436984a63814981f5d28437932da1f9ac37948eb26dfa98c52

Aliases

arxiv: 0905.2355 · arxiv_version: 0905.2355v1 · doi: 10.48550/arxiv.0905.2355 · pith_short_12: DHHPEULBNYPU · pith_short_16: DHHPEULBNYPUG2ME · pith_short_8: DHHPEULB

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/DHHPEULBNYPUG2MEUY4BJGA7LU \
  | 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: 19cef251616e1f436984a63814981f5d28437932da1f9ac37948eb26dfa98c52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63747f9374c0ee84e5d3bb4231037c8b7877d36492f5f6f6c51e8815e72a70a1",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2009-05-14T15:52:40Z",
    "title_canon_sha256": "15801e62baef18c10a2d75f3eb4f1ab1cec514e26aa8c3b5ec40ec581e2536b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2355",
    "kind": "arxiv",
    "version": 1
  }
}