Pith Number

pith:UCZVRRP5

pith:2018:UCZVRRP5Q6SCKYWTD6XA624PTQ

not attested not anchored not stored refs pending

Categoricity in multiuniversal classes

Nathanael Ackerman, Sebastien Vasey, Will Boney

arxiv:1804.09067 v3 · 2018-04-24 · 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{UCZVRRP5Q6SCKYWTD6XA624PTQ}

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	2026-05-17T23:45:56.789817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0b358c5fd87a42562d31fae0f6b8f9c318a254dbd5c643672b06c9ac68d65df

Aliases

arxiv: 1804.09067 · arxiv_version: 1804.09067v3 · doi: 10.48550/arxiv.1804.09067 · pith_short_12: UCZVRRP5Q6SC · pith_short_16: UCZVRRP5Q6SCKYWT · pith_short_8: UCZVRRP5

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/UCZVRRP5Q6SCKYWTD6XA624PTQ \
  | 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: a0b358c5fd87a42562d31fae0f6b8f9c318a254dbd5c643672b06c9ac68d65df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32ee40bd114bb5fc73b0edab0e2ecaa1040577dd3cf6d6a949ee02add7974091",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-04-24T14:32:38Z",
    "title_canon_sha256": "a77d77313ee52db4b9c91636d9727c9108cc05b2e9adb3200a25f10d836974f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09067",
    "kind": "arxiv",
    "version": 3
  }
}