Pith Number

pith:4AY4BVOP

pith:2013:4AY4BVOPMCO3PYZFVGPTWEVZQV

not attested not anchored not stored refs pending

An Update Semantics for Defeasible Obligations

Leendert van der Torre, Yao-Hua Tan

arxiv:1301.6743 v1 · 2013-01-23 · cs.AI · 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{4AY4BVOPMCO3PYZFVGPTWEVZQV}

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	2026-05-18T03:35:12.535135Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e031c0d5cf609db7e325a99f3b12b9857b932d6aa11fa7d4cc43f5aa5bd0cb3f

Aliases

arxiv: 1301.6743 · arxiv_version: 1301.6743v1 · doi: 10.48550/arxiv.1301.6743 · pith_short_12: 4AY4BVOPMCO3 · pith_short_16: 4AY4BVOPMCO3PYZF · pith_short_8: 4AY4BVOP

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/4AY4BVOPMCO3PYZFVGPTWEVZQV \
  | 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: e031c0d5cf609db7e325a99f3b12b9857b932d6aa11fa7d4cc43f5aa5bd0cb3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41373865f1721ff5a952c9f193ed68e083c55ee317e7abab9a61c61c2162b8d6",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2013-01-23T16:01:14Z",
    "title_canon_sha256": "62a827d5dd3eace32cf511c45a9563bf02180a1ac81ebccc366e4436044df285"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.6743",
    "kind": "arxiv",
    "version": 1
  }
}