Pith Number

pith:URE56QTZ

pith:2022:URE56QTZJ7YH6G6WO54QG6AOU4

not attested not anchored not stored refs pending

Cohomology of finite subgroups of the plane Cremona group

Andrew Kresch, Yuri Tschinkel

arxiv:2203.01876 v1 · 2022-03-03 · 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{URE56QTZJ7YH6G6WO54QG6AOU4}

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.

Cited by

1 paper in Pith

Birational involutions of the real projective plane

Receipt and verification

First computed	2026-07-05T04:01:52.686672Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a449df42794ff07f1bd6777903780ea720af14080e575104e28301e31072366a

Aliases

arxiv: 2203.01876 · arxiv_version: 2203.01876v1 · doi: 10.48550/arxiv.2203.01876 · pith_short_12: URE56QTZJ7YH · pith_short_16: URE56QTZJ7YH6G6W · pith_short_8: URE56QTZ

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/URE56QTZJ7YH6G6WO54QG6AOU4 \
  | 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: a449df42794ff07f1bd6777903780ea720af14080e575104e28301e31072366a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "158c15b7beae339db6974d2ab5a0d77b9730fec0c3ebf769d3062804589f60ac",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2022-03-03T17:40:21Z",
    "title_canon_sha256": "e04315570db1700b3f40f181ae8fe7314da2d787e44ea333b3fa612d2868a1da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.01876",
    "kind": "arxiv",
    "version": 1
  }
}