Pith Number

pith:7TW5HODT

pith:2010:7TW5HODTXRS73ZI27AGA2RFEM6

not attested not anchored not stored refs pending

On Hoare-McCarthy algebras

Alban Ponse, Jan A. Bergstra

arxiv:1012.5059 v1 · 2010-12-22 · cs.LO · math.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{7TW5HODTXRS73ZI27AGA2RFEM6}

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	2026-05-18T04:32:44.579927Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fcedd3b873bc65fde51af80c0d44a4679a45362afb73303a95d961ec78080b53

Aliases

arxiv: 1012.5059 · arxiv_version: 1012.5059v1 · doi: 10.48550/arxiv.1012.5059 · pith_short_12: 7TW5HODTXRS7 · pith_short_16: 7TW5HODTXRS73ZI2 · pith_short_8: 7TW5HODT

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/7TW5HODTXRS73ZI27AGA2RFEM6 \
  | 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: fcedd3b873bc65fde51af80c0d44a4679a45362afb73303a95d961ec78080b53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cc65a7c2eeaa8414e55d69e3bd16a586a4eb76897024224c36811bce4d1d5cb",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2010-12-22T17:58:02Z",
    "title_canon_sha256": "b2ee45b1c6cb1e5c38a7b098470bc324782ab2d24948a6cd97e011387bc0beab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.5059",
    "kind": "arxiv",
    "version": 1
  }
}