Pith Number

pith:PQNYJYDB

pith:2018:PQNYJYDBQMTF6TTLU3PTRPHH3D

not attested not anchored not stored refs pending

Lemma Functions for Frama-C: C Programs as Proofs

Denis Efremov, Grigoriy Volkov, Mikhail Mandrykin

arxiv:1811.05879 v1 · 2018-11-14 · cs.SE · 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{PQNYJYDBQMTF6TTLU3PTRPHH3D}

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	2026-05-18T00:00:41.910776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c1b84e06183265f4e6ba6df38bce7d8fdf89572898ca342ba54ec632738a359

Aliases

arxiv: 1811.05879 · arxiv_version: 1811.05879v1 · doi: 10.48550/arxiv.1811.05879 · pith_short_12: PQNYJYDBQMTF · pith_short_16: PQNYJYDBQMTF6TTL · pith_short_8: PQNYJYDB

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/PQNYJYDBQMTF6TTLU3PTRPHH3D \
  | 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: 7c1b84e06183265f4e6ba6df38bce7d8fdf89572898ca342ba54ec632738a359

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed5f5aff0f657ec8041a94e0e37e6732fdd67816c587976d33aaabf36df111bf",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2018-11-14T16:14:45Z",
    "title_canon_sha256": "37780f42d86618f381628802eabb4b0066d5283f0e1218758a2d51fcb815aee7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.05879",
    "kind": "arxiv",
    "version": 1
  }
}