Pith Number

pith:Q5W7NB3C

pith:2025:Q5W7NB3CFXKYR5LELMTPAIIWDD

not attested not anchored not stored refs pending

Cylindricity of weighted singular del Pezzo surfaces over fields of characteristic zero

Dae-Won Lee, In-Kyun Kim, Masatomo Sawahara

arxiv:2512.20134 v3 · 2025-12-23 · 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{Q5W7NB3CFXKYR5LELMTPAIIWDD}

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	2026-06-02T01:04:15.254682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

876df687622dd588f5645b26f0211618f3c91e36496197480d55450f2a63d247

Aliases

arxiv: 2512.20134 · arxiv_version: 2512.20134v3 · doi: 10.48550/arxiv.2512.20134 · pith_short_12: Q5W7NB3CFXKY · pith_short_16: Q5W7NB3CFXKYR5LE · pith_short_8: Q5W7NB3C

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/Q5W7NB3CFXKYR5LELMTPAIIWDD \
  | 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: 876df687622dd588f5645b26f0211618f3c91e36496197480d55450f2a63d247

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c46ad2d5abcc5d56b72f14bd00aea1d86dbbf2b047e6b0e250432df982ed9d2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2025-12-23T07:53:45Z",
    "title_canon_sha256": "7382eb7675728a61551f32c2b7a647c39c97e64953375870c8e6a9d50338c318"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.20134",
    "kind": "arxiv",
    "version": 3
  }
}