Pith Number

pith:FQCTLKMX

pith:2020:FQCTLKMXP6WMTGNVA5LR34PZ5E

not attested not anchored not stored refs pending

QED at Large: A Survey of Engineering of Formally Verified Software

Ilya Sergey, Karl Palmskog, Milos Gligoric, Talia Ringer, Zachary Tatlock

arxiv:2003.06458 v1 · 2020-03-13 · 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{FQCTLKMXP6WMTGNVA5LR34PZ5E}

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	2026-07-05T00:47:48.601634Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c0535a9977facc999b507571df1f9e938bf3df93866a708acc8a73cef45000d

Aliases

arxiv: 2003.06458 · arxiv_version: 2003.06458v1 · doi: 10.48550/arxiv.2003.06458 · pith_short_12: FQCTLKMXP6WM · pith_short_16: FQCTLKMXP6WMTGNV · pith_short_8: FQCTLKMX

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/FQCTLKMXP6WMTGNVA5LR34PZ5E \
  | 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: 2c0535a9977facc999b507571df1f9e938bf3df93866a708acc8a73cef45000d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83cdb7028f62c91bc654b2b89475ca0c177461be18fd1bd0bcd45e27de1cdb8f",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2020-03-13T19:35:25Z",
    "title_canon_sha256": "cb8b8be26364006e208d00184d9b99129001a09f4673afbf2091b9fd190c73f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.06458",
    "kind": "arxiv",
    "version": 1
  }
}