Pith Number

pith:BNIDQDNA

pith:2021:BNIDQDNALIBPIRLQFOQNQAQ2BV

not attested not anchored not stored refs pending

Validation Obligations: A Novel Approach to Check Compliance between Requirements and their Formal Specification

Alexander Egyed, Atif Mashkoor, Michael Leuschel

arxiv:2102.06037 v1 · 2021-02-11 · 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{BNIDQDNALIBPIRLQFOQNQAQ2BV}

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	2026-07-05T02:14:37.192645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b50380da05a02f445702ba0d8021a0d7db8e40bc75bc14f2dbe2668b5cf6b8b

Aliases

arxiv: 2102.06037 · arxiv_version: 2102.06037v1 · doi: 10.48550/arxiv.2102.06037 · pith_short_12: BNIDQDNALIBP · pith_short_16: BNIDQDNALIBPIRLQ · pith_short_8: BNIDQDNA

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/BNIDQDNALIBPIRLQFOQNQAQ2BV \
  | 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: 0b50380da05a02f445702ba0d8021a0d7db8e40bc75bc14f2dbe2668b5cf6b8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "334f0a7c2dcf6282b6ead95a4abf07c75890aa04404898e09131c582286e927a",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2021-02-11T14:28:32Z",
    "title_canon_sha256": "8bf9a50ac0cd5948613935110d74afb1387ccfec1d8e1cf51caa1139cd77559f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.06037",
    "kind": "arxiv",
    "version": 1
  }
}