Pith Number

pith:2YUQRZT4

pith:2019:2YUQRZT4I533HOJNSKWCLGY4R4

not attested not anchored not stored refs pending

A Note on the Possibility of Self-Reference in Mathematics

Arieh Lev

arxiv:1908.02539 v1 · 2019-08-07 · 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{2YUQRZT4I533HOJNSKWCLGY4R4}

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	2026-07-04T23:52:10.084116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d62908e67c4777b3b92d92ac259b1c8f08b86a69a35475c43bef0baf2f7cdc08

Aliases

arxiv: 1908.02539 · arxiv_version: 1908.02539v1 · doi: 10.48550/arxiv.1908.02539 · pith_short_12: 2YUQRZT4I533 · pith_short_16: 2YUQRZT4I533HOJN · pith_short_8: 2YUQRZT4

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/2YUQRZT4I533HOJNSKWCLGY4R4 \
  | 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: d62908e67c4777b3b92d92ac259b1c8f08b86a69a35475c43bef0baf2f7cdc08

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "123c70720a6069efa8ee7b7194afbbf82e6f72a54c1211dd352a53f16102d499",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-08-07T11:43:05Z",
    "title_canon_sha256": "6923e1f2e4a80524a9b0ab86b6c53d964f3d25b6e87808f2f4c6499bd498405d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02539",
    "kind": "arxiv",
    "version": 1
  }
}