Pith Number

pith:PUO245WK

pith:2016:PUO245WKUDGS6HZUJMSAMVRNQL

not attested not anchored not stored refs pending

Morphisms to Brauer-Severi Varieties, with Applications to Del Pezzo Surfaces

Christian Liedtke

arxiv:1602.07491 v2 · 2016-02-24 · 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{PUO245WKUDGS6HZUJMSAMVRNQL}

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	2026-05-18T00:51:03.303889Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d1dae76caa0cd2f1f344b2406562d82f482d27fd258f59ffe2e4342174bf990

Aliases

arxiv: 1602.07491 · arxiv_version: 1602.07491v2 · doi: 10.48550/arxiv.1602.07491 · pith_short_12: PUO245WKUDGS · pith_short_16: PUO245WKUDGS6HZU · pith_short_8: PUO245WK

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/PUO245WKUDGS6HZUJMSAMVRNQL \
  | 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: 7d1dae76caa0cd2f1f344b2406562d82f482d27fd258f59ffe2e4342174bf990

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d7b8cb89beb6c4aa286491dbdd24d04b44e971312298ddf047a866b8d1ad7dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-02-24T13:21:58Z",
    "title_canon_sha256": "4a4f37b1c320f1bab31b59efe7cb17675c688046f93b9f39872102a1c6888e18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.07491",
    "kind": "arxiv",
    "version": 2
  }
}