Pith Number

pith:Z7V2VCET

pith:2018:Z7V2VCETBYR4RB5FGYJW6ZWFFO

not attested not anchored not stored refs pending

On intermediate extensions of generic extensions by a random real

Vassily Lyubetsky, Vladimir Kanovei

arxiv:1811.10568 v1 · 2018-11-26 · math.LO

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z7V2VCETBYR4RB5FGYJW6ZWFFO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:59:54.314467Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfebaa88930e23c887a536136f66c52b97be7043ddf48a60e86c399e118641f3

Aliases

arxiv: 1811.10568 · arxiv_version: 1811.10568v1 · doi: 10.48550/arxiv.1811.10568 · pith_short_12: Z7V2VCETBYR4 · pith_short_16: Z7V2VCETBYR4RB5F · pith_short_8: Z7V2VCET

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/Z7V2VCETBYR4RB5FGYJW6ZWFFO \
  | 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: cfebaa88930e23c887a536136f66c52b97be7043ddf48a60e86c399e118641f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73cb0f95b7748d3e9b99ed6d0ec657315db5fa059d2a4d03f270985c33fdf388",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-11-26T18:17:57Z",
    "title_canon_sha256": "c0fb420228956eebd062739c2016b360dfb4c41ad458483ae2ea4d650020dd73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.10568",
    "kind": "arxiv",
    "version": 1
  }
}