Pith Number

pith:OIJHKBCB

pith:2017:OIJHKBCBPFH3XUBF3R2POYTNTR

not attested not anchored not stored refs pending

NIP formulas and Baire 1 definability

Karim Khanaki

arxiv:1703.08731 v2 · 2017-03-25 · 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{OIJHKBCBPFH3XUBF3R2POYTNTR}

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	2026-05-18T00:47:25.875576Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7212750441794fbbd025dc74f7626d9c4574b0277d77173af3c791dec0414ed1

Aliases

arxiv: 1703.08731 · arxiv_version: 1703.08731v2 · doi: 10.48550/arxiv.1703.08731 · pith_short_12: OIJHKBCBPFH3 · pith_short_16: OIJHKBCBPFH3XUBF · pith_short_8: OIJHKBCB

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/OIJHKBCBPFH3XUBF3R2POYTNTR \
  | 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: 7212750441794fbbd025dc74f7626d9c4574b0277d77173af3c791dec0414ed1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fddb191f55825b18109f0b0571eb723e31469aa24d1dc8e3f067526a3e39af32",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2017-03-25T18:55:50Z",
    "title_canon_sha256": "9f0202583642ea2d8ec85fa57742df8a9c6a659296991c14bffb95b9cbbe7f34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.08731",
    "kind": "arxiv",
    "version": 2
  }
}