Pith Number

pith:MSZNOQR4

pith:2008:MSZNOQR4EPHKJADK3L5OLKHAQE

not attested not anchored not stored refs pending

Finite-state concurrent programs can be expressed pairwise

Paul C. Attie

arxiv:0801.0677 v1 · 2008-01-04 · 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{MSZNOQR4EPHKJADK3L5OLKHAQE}

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	2026-07-04T15:06:38.010928Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64b2d7423c23cea4806adafae5a8e0811d95442a85cbcac6571f8cf99e8fc093

Aliases

arxiv: 0801.0677 · arxiv_version: 0801.0677v1 · doi: 10.48550/arxiv.0801.0677 · pith_short_12: MSZNOQR4EPHK · pith_short_16: MSZNOQR4EPHKJADK · pith_short_8: MSZNOQR4

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/MSZNOQR4EPHKJADK3L5OLKHAQE \
  | 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: 64b2d7423c23cea4806adafae5a8e0811d95442a85cbcac6571f8cf99e8fc093

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80d1d8ae6e0270cd129612be4dcdabcc33819d2df6baab8d140171c38a11b0e6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.LO",
    "submitted_at": "2008-01-04T13:14:31Z",
    "title_canon_sha256": "8ea07885f20beb30fe8eed6361fa4f38c5190e473ab6fd829a809b3c9f32557e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0801.0677",
    "kind": "arxiv",
    "version": 1
  }
}