Pith Number

pith:V2Q2QEAC

pith:2019:V2Q2QEACU53DIXIZLQ4PUB6DT6

not attested not anchored not stored refs pending

The classification of complex algebraic surfaces

Ciro Ciliberto

arxiv:1905.07756 v1 · 2019-05-19 · 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{V2Q2QEACU53DIXIZLQ4PUB6DT6}

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	2026-05-17T23:45:48.578959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aea1a81002a776345d195c38fa07c39f9e70669b1a7fd97c10cb048bc4d6d335

Aliases

arxiv: 1905.07756 · arxiv_version: 1905.07756v1 · doi: 10.48550/arxiv.1905.07756 · pith_short_12: V2Q2QEACU53D · pith_short_16: V2Q2QEACU53DIXIZ · pith_short_8: V2Q2QEAC

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/V2Q2QEACU53DIXIZLQ4PUB6DT6 \
  | 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: aea1a81002a776345d195c38fa07c39f9e70669b1a7fd97c10cb048bc4d6d335

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b785793a69789eb9b2c1ac4c982aad542a662b99d6504e5eb498ef1d24400c8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-05-19T15:27:06Z",
    "title_canon_sha256": "1b5c90d617a87d14830b3de103cd1f8b2186200a26003aa9bdfa2b24833c338d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.07756",
    "kind": "arxiv",
    "version": 1
  }
}