Pith Number

pith:EX7RKQQQ

pith:2019:EX7RKQQQEL3NENLGP3ILTQG4IX

not attested not anchored not stored refs pending

Whither Programs as Specifications

David A. Naumann, Minh Ngo

arxiv:1906.03557 v2 · 2019-06-09 · 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{EX7RKQQQEL3NENLGP3ILTQG4IX}

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	2026-05-17T23:39:35.232788Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25ff15421022f6d235667ed0b9c0dc45f2bd1a580dbde73259d2d6985a26b2e8

Aliases

arxiv: 1906.03557 · arxiv_version: 1906.03557v2 · doi: 10.48550/arxiv.1906.03557 · pith_short_12: EX7RKQQQEL3N · pith_short_16: EX7RKQQQEL3NENLG · pith_short_8: EX7RKQQQ

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/EX7RKQQQEL3NENLGP3ILTQG4IX \
  | 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: 25ff15421022f6d235667ed0b9c0dc45f2bd1a580dbde73259d2d6985a26b2e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8be2411dcc19701e3cb4ec2088be6109a1647ea45aacde67ea7a434cdd9d4582",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-06-09T03:55:10Z",
    "title_canon_sha256": "518ebae00ad30f611259ad06b527f598d507171aeffb48127485f8e7d3619253"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.03557",
    "kind": "arxiv",
    "version": 2
  }
}