Pith Number

pith:4OMZACVR

pith:2018:4OMZACVRO4MCFCFAV4DARUBNX5

not attested not anchored not stored refs pending

G-birational superrigidity of del Pezzo surfaces of degree 2 and 3

Lucas das Dores, Mirko Mauri

arxiv:1808.05023 v1 · 2018-08-15 · 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{4OMZACVRO4MCFCFAV4DARUBNX5}

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	2026-05-18T00:08:01.865434Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e399900ab177182288a0af0608d02dbf7567df24b9d5f11d023bd427d22fba44

Aliases

arxiv: 1808.05023 · arxiv_version: 1808.05023v1 · doi: 10.48550/arxiv.1808.05023 · pith_short_12: 4OMZACVRO4MC · pith_short_16: 4OMZACVRO4MCFCFA · pith_short_8: 4OMZACVR

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/4OMZACVRO4MCFCFAV4DARUBNX5 \
  | 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: e399900ab177182288a0af0608d02dbf7567df24b9d5f11d023bd427d22fba44

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "905b408d65ca6738576ccc51c0439a46026abdbf15e0d68669e813f9b7a45ab1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-08-15T10:13:23Z",
    "title_canon_sha256": "beea1f56e9dc460f7735f89bdb8c3552a3f38e239dacdf8fb148c17e80836fb6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.05023",
    "kind": "arxiv",
    "version": 1
  }
}