Pith Number

pith:U6ZQSTPC

pith:2018:U6ZQSTPCW4W2MJYCLEPVQ76YWK

not attested not anchored not stored refs pending

The Delta-calculus: syntax and types

Claude Stolze, Luigi Liquori

arxiv:1803.09660 v4 · 2018-03-26 · 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{U6ZQSTPCW4W2MJYCLEPVQ76YWK}

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	2026-05-17T23:52:53.242233Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7b3094de2b72da62702591f587fd8b2ae78021805bb0c802a68d6459d453364

Aliases

arxiv: 1803.09660 · arxiv_version: 1803.09660v4 · doi: 10.48550/arxiv.1803.09660 · pith_short_12: U6ZQSTPCW4W2 · pith_short_16: U6ZQSTPCW4W2MJYC · pith_short_8: U6ZQSTPC

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/U6ZQSTPCW4W2MJYCLEPVQ76YWK \
  | 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: a7b3094de2b72da62702591f587fd8b2ae78021805bb0c802a68d6459d453364

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aaa051e5af0e70e84ce94c524d2e94168aaab89237a65421bff6432e017d5aa8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2018-03-26T15:26:55Z",
    "title_canon_sha256": "7eb92745c1a0b81028885e813d021004693731e2b076c5992c9d0b1fcc6540f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.09660",
    "kind": "arxiv",
    "version": 4
  }
}