Pith Number

pith:G22DOZR3

pith:2004:G22DOZR3KSFW2VDTJEHVJS2HVI

not attested not anchored not stored refs pending

The cone of curves of Fano varieties of coindex four

Elena Chierici, Gianluca Occhetta

arxiv:math/0401429 v2 · 2004-01-30 · 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{G22DOZR3KSFW2VDTJEHVJS2HVI}

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	2026-05-18T00:34:05.677056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

36b437663b548b6d5473490f54cb47aa168a13d1fd1ba4a568cf043cc1418465

Aliases

arxiv: math/0401429 · arxiv_version: math/0401429v2 · doi: 10.48550/arxiv.math/0401429 · pith_short_12: G22DOZR3KSFW · pith_short_16: G22DOZR3KSFW2VDT · pith_short_8: G22DOZR3

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/G22DOZR3KSFW2VDTJEHVJS2HVI \
  | 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: 36b437663b548b6d5473490f54cb47aa168a13d1fd1ba4a568cf043cc1418465

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4b507ed4cfbdc51460ab8ce9a7e7f6c2b99999641b25ff4fa658f0707c5c375",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2004-01-30T10:58:36Z",
    "title_canon_sha256": "e280fdcb20338be601b4a51b834467bac952148fb896524dd806ccc74e4e36ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0401429",
    "kind": "arxiv",
    "version": 2
  }
}