Pith Number

pith:DAIY4W6I

pith:2012:DAIY4W6IAF2VQ6ID4I2OJ67Y7S

not attested not anchored not stored refs pending

Density of rational points on del Pezzo surfaces of degree one

Cecilia Salgado, Ronald van Luijk

arxiv:1212.2364 v2 · 2012-12-11 · 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{DAIY4W6IAF2VQ6ID4I2OJ67Y7S}

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	2026-05-18T02:55:36.527800Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18118e5bc80175587903e234e4fbf8fc9e19a3c06bb613e3c66b008b8a06fe32

Aliases

arxiv: 1212.2364 · arxiv_version: 1212.2364v2 · doi: 10.48550/arxiv.1212.2364 · pith_short_12: DAIY4W6IAF2V · pith_short_16: DAIY4W6IAF2VQ6ID · pith_short_8: DAIY4W6I

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/DAIY4W6IAF2VQ6ID4I2OJ67Y7S \
  | 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: 18118e5bc80175587903e234e4fbf8fc9e19a3c06bb613e3c66b008b8a06fe32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "189e604139de255fc7a127a22788b8012f81162406e29646f435f8284459881f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-12-11T10:02:14Z",
    "title_canon_sha256": "3affdcf066a028073f75bae47d3c761db66aac112c7584755487cc6899cdd6dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.2364",
    "kind": "arxiv",
    "version": 2
  }
}