Pith Number

pith:ECFW2D4S

pith:2010:ECFW2D4SA7GLVTZBTGFPQCHC54

not attested not anchored not stored refs pending

Shape Calculus: Timed Operational Semantics and Well-formedness

Diletta Romana Cacciagrano, Emanuela Merelli, Ezio Bartocci, Luca Tesei, Maria Rita Di Berardini

arxiv:1011.2488 v1 · 2010-11-09 · cs.PL · cs.CE · cs.CG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ECFW2D4SA7GLVTZBTGFPQCHC54}

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	2026-05-18T04:36:30.261876Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

208b6d0f9207ccbacf21998af808e2ef044de38e27ac7a8ea5a6d9391856d206

Aliases

arxiv: 1011.2488 · arxiv_version: 1011.2488v1 · doi: 10.48550/arxiv.1011.2488 · pith_short_12: ECFW2D4SA7GL · pith_short_16: ECFW2D4SA7GLVTZB · pith_short_8: ECFW2D4S

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/ECFW2D4SA7GLVTZBTGFPQCHC54 \
  | 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: 208b6d0f9207ccbacf21998af808e2ef044de38e27ac7a8ea5a6d9391856d206

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "58d51bd5a633fa31e017153b247dd150e6221a9994a646c7a1df9c9181625111",
    "cross_cats_sorted": [
      "cs.CE",
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2010-11-09T11:33:59Z",
    "title_canon_sha256": "15f020f285da6c4656ae6d76b53e4b93e8b8edd1b029e20db47a6ef5bbeaac23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.2488",
    "kind": "arxiv",
    "version": 1
  }
}