Pith Number

pith:4ZYYP7SZ

pith:2014:4ZYYP7SZ3OKBBSERIBMOM3NOSS

not attested not anchored not stored refs pending

Principles for Verification Tools: Separation Logic

Brijesh Dongol, Georg Struth, Victor B. F. Gomes

arxiv:1410.4439 v1 · 2014-10-16 · cs.LO · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4ZYYP7SZ3OKBBSERIBMOM3NOSS}

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	2026-05-18T02:39:56.131418Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e67187fe59db9410c8914058e66dae94a2e99e50a05267d79ce77b6b84cba794

Aliases

arxiv: 1410.4439 · arxiv_version: 1410.4439v1 · doi: 10.48550/arxiv.1410.4439 · pith_short_12: 4ZYYP7SZ3OKB · pith_short_16: 4ZYYP7SZ3OKBBSER · pith_short_8: 4ZYYP7SZ

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/4ZYYP7SZ3OKBBSERIBMOM3NOSS \
  | 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: e67187fe59db9410c8914058e66dae94a2e99e50a05267d79ce77b6b84cba794

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a34c1a3f9e1d4d82e3c3a278096919f152d7a14e7ec5684a914212f03fb0ca5",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2014-10-16T16:08:19Z",
    "title_canon_sha256": "6dc1dc2e3e06630298971ed5175b3280ca2b4511432c3ef435cbf76d4cd3cd93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.4439",
    "kind": "arxiv",
    "version": 1
  }
}