Pith Number

pith:AIJZ3GNR

pith:2026:AIJZ3GNRPTMF4KEMJ6MQOQY2HT

not attested not anchored not stored refs pending

FVSpec: Real-World Property-Based Tests as Lean Challenges

Hazel Shackleton, Max von Hippel, Mike Dodds, Quinn Dougherty

arxiv:2606.01008 v1 · 2026-05-31 · cs.SE · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AIJZ3GNRPTMF4KEMJ6MQOQY2HT}

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	2026-06-02T01:04:18.225456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

02139d99b17cd85e288c4f9907431a3ce3ed0b14cdb0f6a4c50f05a47aa3d68b

Aliases

arxiv: 2606.01008 · arxiv_version: 2606.01008v1 · doi: 10.48550/arxiv.2606.01008 · pith_short_12: AIJZ3GNRPTMF · pith_short_16: AIJZ3GNRPTMF4KEM · pith_short_8: AIJZ3GNR

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/AIJZ3GNRPTMF4KEMJ6MQOQY2HT \
  | 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: 02139d99b17cd85e288c4f9907431a3ce3ed0b14cdb0f6a4c50f05a47aa3d68b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1db95b934bf8f26e3de29c6ae3cd2677f7b2784ea2c01ca9df0182cfa4677cea",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2026-05-31T04:51:27Z",
    "title_canon_sha256": "74f5c59d15094843096db894880d258c3bb69049cbc484680a7e16aedca3640a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.01008",
    "kind": "arxiv",
    "version": 1
  }
}