Pith Number

pith:2QSUZJJU

pith:2016:2QSUZJJUCQKMNUQ3YX65KU5UOM

not attested not anchored not stored refs pending

Cohomologie non ramifi\'ee de degr\'e 3 : vari\'et\'es cellulaires et surfaces de del Pezzo de degr\'e au moins 5

Yang Cao

arxiv:1607.01739 v2 · 2016-07-06 · 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{2QSUZJJUCQKMNUQ3YX65KU5UOM}

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	2026-05-18T00:20:59.390948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4254ca5341414c6d21bc5fdd553b4731ec0c33a4b17e47098e96c8058a16648

Aliases

arxiv: 1607.01739 · arxiv_version: 1607.01739v2 · doi: 10.48550/arxiv.1607.01739 · pith_short_12: 2QSUZJJUCQKM · pith_short_16: 2QSUZJJUCQKMNUQ3 · pith_short_8: 2QSUZJJU

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/2QSUZJJUCQKMNUQ3YX65KU5UOM \
  | 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: d4254ca5341414c6d21bc5fdd553b4731ec0c33a4b17e47098e96c8058a16648

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8da0032caa654a1799334e5d29c1d85b41632724543c8ca328d9f083b5070be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-07-06T18:52:01Z",
    "title_canon_sha256": "6a2a6476b60bbc51525b61bef2e62b637eab4f1340ba57e05212268a7bc5ebf3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.01739",
    "kind": "arxiv",
    "version": 2
  }
}