Pith Number

pith:35QZLFTX

pith:2013:35QZLFTX6L743YAZWETZ5IDKWX

not attested not anchored not stored refs pending

Quotients of del Pezzo surfaces of high degree

Andrey Trepalin

arxiv:1312.6904 v3 · 2013-12-25 · 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{35QZLFTX6L743YAZWETZ5IDKWX}

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	2026-05-18T00:59:59.292632Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df61959677f2ffcde019b1279ea06ab5c2d231d268336d6b039896f2111baee9

Aliases

arxiv: 1312.6904 · arxiv_version: 1312.6904v3 · doi: 10.48550/arxiv.1312.6904 · pith_short_12: 35QZLFTX6L74 · pith_short_16: 35QZLFTX6L743YAZ · pith_short_8: 35QZLFTX

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/35QZLFTX6L743YAZWETZ5IDKWX \
  | 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: df61959677f2ffcde019b1279ea06ab5c2d231d268336d6b039896f2111baee9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42901d5feb6b26d1a5667aa77f3eacf6e2a8567896d56744ec3976a413afd1b8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-12-25T01:13:32Z",
    "title_canon_sha256": "8082a7c163c67b354e13bc619493543f0c4043783aa57ee7816b4d7b4000d20a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.6904",
    "kind": "arxiv",
    "version": 3
  }
}