Pith Number

pith:N2SAJWXV

pith:2013:N2SAJWXVLUKHTRLJMNO2IHY643

not attested not anchored not stored refs pending

Soft Contract Verification

David Van Horn, Phuc C. Nguyen, Sam Tobin-Hochstadt

arxiv:1307.6239 v4 · 2013-07-23 · 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{N2SAJWXVLUKHTRLJMNO2IHY643}

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	2026-05-18T02:49:45.989161Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ea404daf55d1479c569635da41f1ee6cfb958277ac90fd30eab579450027aba

Aliases

arxiv: 1307.6239 · arxiv_version: 1307.6239v4 · doi: 10.48550/arxiv.1307.6239 · pith_short_12: N2SAJWXVLUKH · pith_short_16: N2SAJWXVLUKHTRLJ · pith_short_8: N2SAJWXV

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/N2SAJWXVLUKHTRLJMNO2IHY643 \
  | 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: 6ea404daf55d1479c569635da41f1ee6cfb958277ac90fd30eab579450027aba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d938eca8881430ef89f32d4b1fb71bb50a5a342562030f656c6214b835294d70",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2013-07-23T20:30:46Z",
    "title_canon_sha256": "35cca98b66a64ea59e8bfac72c7166286aea3ecaaff47c08882fb0c51c0b4da8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.6239",
    "kind": "arxiv",
    "version": 4
  }
}