Pith Number

pith:T7WQB5NV

pith:2008:T7WQB5NVRBVGAY6CGJLDJS2N73

not attested not anchored not stored refs pending

Q-Fano threefolds of large Fano index, I

Yuri Prokhorov

arxiv:0812.1695 v2 · 2008-12-09 · 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{T7WQB5NVRBVGAY6CGJLDJS2N73}

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	2026-05-18T04:31:31.402738Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fed00f5b5886a6063c2325634cb4dfede73e71d9fb3c729299a8b802b2c527c

Aliases

arxiv: 0812.1695 · arxiv_version: 0812.1695v2 · doi: 10.48550/arxiv.0812.1695 · pith_short_12: T7WQB5NVRBVG · pith_short_16: T7WQB5NVRBVGAY6C · pith_short_8: T7WQB5NV

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/T7WQB5NVRBVGAY6CGJLDJS2N73 \
  | 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: 9fed00f5b5886a6063c2325634cb4dfede73e71d9fb3c729299a8b802b2c527c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3150e43ed3b8eb6de6653bea7a37820823391d7b51682cc5ea631b25609cf411",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-12-09T18:22:55Z",
    "title_canon_sha256": "bb1581d9c37a5609d9b01cca856ac2d62a51bf723158ef6d5f0da3bd1da465fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.1695",
    "kind": "arxiv",
    "version": 2
  }
}