Pith Number

pith:NOCJ3KAY

pith:2019:NOCJ3KAYSZTMSSD3A7TYGY4EKA

not attested not anchored not stored refs pending

Sometime a Paradox, Now Proof: Non-First-Order-izability of Yablo's Paradox

Saeed Salehi

arxiv:1908.01496 v4 · 2019-08-05 · 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{NOCJ3KAYSZTMSSD3A7TYGY4EKA}

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	2026-07-05T04:21:00.427695Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b849da8189666c9487b07e7836384501d76865839c5cdf478b31e3ab4dd70f7

Aliases

arxiv: 1908.01496 · arxiv_version: 1908.01496v4 · doi: 10.48550/arxiv.1908.01496 · pith_short_12: NOCJ3KAYSZTM · pith_short_16: NOCJ3KAYSZTMSSD3 · pith_short_8: NOCJ3KAY

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/NOCJ3KAYSZTMSSD3A7TYGY4EKA \
  | 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: 6b849da8189666c9487b07e7836384501d76865839c5cdf478b31e3ab4dd70f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2930aad99c961326df80a0c01c21d274d67e6edc7d2f1d048494a8ff6769ad34",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-08-05T07:22:08Z",
    "title_canon_sha256": "4727ec9bad8379612a3d770058df6fb7d5ccbf31c91509a30ca4441f9452b196"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01496",
    "kind": "arxiv",
    "version": 4
  }
}