Pith Number

pith:Q4QFICV5

pith:2012:Q4QFICV5MKUWAFD2UH6F3D2Y6S

not attested not anchored not stored refs pending

Witnessing dp-rank

Itay Kaplan, Pierre Simon

arxiv:1201.5799 v2 · 2012-01-27 · math.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{Q4QFICV5MKUWAFD2UH6F3D2Y6S}

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	2026-05-18T01:21:05.796847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8720540abd62a960147aa1fc5d8f58f4bb9460ce0d5b31b39431ff57aee8302b

Aliases

arxiv: 1201.5799 · arxiv_version: 1201.5799v2 · doi: 10.48550/arxiv.1201.5799 · pith_short_12: Q4QFICV5MKUW · pith_short_16: Q4QFICV5MKUWAFD2 · pith_short_8: Q4QFICV5

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/Q4QFICV5MKUWAFD2UH6F3D2Y6S \
  | 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: 8720540abd62a960147aa1fc5d8f58f4bb9460ce0d5b31b39431ff57aee8302b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92362baaaecd16eaf7af9971e0d3cb835337baea081457bb26a52072eb6195fb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2012-01-27T15:27:25Z",
    "title_canon_sha256": "b048423b26de32cc30728dfca48f7eb910ba9fda8808a6c0dcdb641068f70650"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.5799",
    "kind": "arxiv",
    "version": 2
  }
}