Pith Number

pith:FBB7CJH4

pith:2019:FBB7CJH4NDGBP5MKB4WDEUAQYJ

not attested not anchored not stored refs pending

Anticanonical codes from del Pezzo surfaces with Picard rank one

Alain Couvreur (LIX), David Madore (LTCI), Emmanuel Hallouin (IMT), Hugues Randriam (LTCI), Jade Nardi (IMT), Matthieu Rambaud (LTCI), R\'egis Blache (LAMIA)

arxiv:1903.09397 v1 · 2019-03-22 · math.AG · cs.IT · math.IT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FBB7CJH4NDGBP5MKB4WDEUAQYJ}

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	2026-05-17T23:50:39.775549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2843f124fc68cc17f58a0f2c325010c253a18b3c05de21ec33ef1f8f00911977

Aliases

arxiv: 1903.09397 · arxiv_version: 1903.09397v1 · doi: 10.48550/arxiv.1903.09397 · pith_short_12: FBB7CJH4NDGB · pith_short_16: FBB7CJH4NDGBP5MK · pith_short_8: FBB7CJH4

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/FBB7CJH4NDGBP5MKB4WDEUAQYJ \
  | 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: 2843f124fc68cc17f58a0f2c325010c253a18b3c05de21ec33ef1f8f00911977

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40ca77fe7f450936fc7568d7da588efa8af2b7186c6f632ee341d670d25b4f2e",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-03-22T08:25:50Z",
    "title_canon_sha256": "d385bace3355efb3357f4bbbfdec4ac35fedb4489f6c2f6e0e8953afd686ae6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.09397",
    "kind": "arxiv",
    "version": 1
  }
}