Pith Number

pith:DBJGXH4Q

pith:2017:DBJGXH4QGEWR5AS4ZSTTUUGD77

not attested not anchored not stored refs pending

Classifying $VII_0$ surfaces with $b_2 = 0$ via group theory

Federico Buonerba, Fedor Bogomolov, Nikon Kurnosov

arxiv:1709.00062 v3 · 2017-08-31 · 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{DBJGXH4QGEWR5AS4ZSTTUUGD77}

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	2026-05-17T23:45:53.452527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18526b9f90312d1e825ccca73a50c3fff71d3f9cba4155bce64e1fae6b4a0dd5

Aliases

arxiv: 1709.00062 · arxiv_version: 1709.00062v3 · doi: 10.48550/arxiv.1709.00062 · pith_short_12: DBJGXH4QGEWR · pith_short_16: DBJGXH4QGEWR5AS4 · pith_short_8: DBJGXH4Q

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/DBJGXH4QGEWR5AS4ZSTTUUGD77 \
  | 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: 18526b9f90312d1e825ccca73a50c3fff71d3f9cba4155bce64e1fae6b4a0dd5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52b9c93406cf0bc1b254a8f05e5fd804d0f358c422a5f96f127db885ca9ef78c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-08-31T20:23:34Z",
    "title_canon_sha256": "9a465670f6b3b2bcf9a63cfb5810cb977e391e4ea8801acc308f5a5c928db4b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.00062",
    "kind": "arxiv",
    "version": 3
  }
}