Pith Number

pith:A4ZXM6V2

pith:2014:A4ZXM6V2IZB4BNN4KPXDC3Z4I4

not attested not anchored not stored refs pending

Examples of cylindrical Fano fourfolds

Mikhail Zaidenberg (IF), Yuri Prokhorov

arxiv:1406.6339 v1 · 2014-06-24 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A4ZXM6V2IZB4BNN4KPXDC3Z4I4}

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	2026-05-18T02:49:03.636998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0733767aba4643c0b5bc53ee316f3c4724d45ac99a8a8fc34f546580557ce779

Aliases

arxiv: 1406.6339 · arxiv_version: 1406.6339v1 · doi: 10.48550/arxiv.1406.6339 · pith_short_12: A4ZXM6V2IZB4 · pith_short_16: A4ZXM6V2IZB4BNN4 · pith_short_8: A4ZXM6V2

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/A4ZXM6V2IZB4BNN4KPXDC3Z4I4 \
  | 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: 0733767aba4643c0b5bc53ee316f3c4724d45ac99a8a8fc34f546580557ce779

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2724440f47078f160043d7e848176583d1e8266c3b67840ec831d06952f8a509",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-06-24T19:24:10Z",
    "title_canon_sha256": "7020ff75afc4b915ed8c94ec1865f1c62b3fc1723297044948235ea75711e850"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.6339",
    "kind": "arxiv",
    "version": 1
  }
}