Pith Number

pith:2I7GIEET

pith:2012:2I7GIEETG4XXTA4AVRPWB5N6KS

not attested not anchored not stored refs pending

A Well-typed Lightweight Situation Calculus

Li Tan

arxiv:1201.2430 v2 · 2012-01-11 · cs.PL · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2I7GIEETG4XXTA4AVRPWB5N6KS}

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	2026-05-18T03:53:20.027909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d23e641093372f798380ac5f60f5be5485c6fbe4f5d9f1a4383dd401dbd7a2c8

Aliases

arxiv: 1201.2430 · arxiv_version: 1201.2430v2 · doi: 10.48550/arxiv.1201.2430 · pith_short_12: 2I7GIEETG4XX · pith_short_16: 2I7GIEETG4XXTA4A · pith_short_8: 2I7GIEET

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/2I7GIEETG4XXTA4AVRPWB5N6KS \
  | 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: d23e641093372f798380ac5f60f5be5485c6fbe4f5d9f1a4383dd401dbd7a2c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0655dccd7441cf0cd9d45d917f29b049d384d3f24cbc71ecd830ac13986e5339",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2012-01-11T21:44:18Z",
    "title_canon_sha256": "fa29a8fd9a8ee8e741c511d30da72c81836fbcfb30d062c4d4df2f47e26235e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.2430",
    "kind": "arxiv",
    "version": 2
  }
}