Pith Number

pith:T4QNMCBA

pith:2025:T4QNMCBALP3QSWT737JTTUBPPE

not attested not anchored not stored refs pending

Birational equivalence of Severi-Brauer varieties

J\'anos Koll\'ar

arxiv:2505.24720 v1 · 2025-05-30 · math.AG · math.RA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T4QNMCBALP3QSWT737JTTUBPPE}

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	2026-07-05T11:12:55.442584Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f20d608205bf7095a7fdfd339d02f790035283b672c76e84a39bfa67db4bbd3

Aliases

arxiv: 2505.24720 · arxiv_version: 2505.24720v1 · doi: 10.48550/arxiv.2505.24720 · pith_short_12: T4QNMCBALP3Q · pith_short_16: T4QNMCBALP3QSWT7 · pith_short_8: T4QNMCBA

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/T4QNMCBALP3QSWT737JTTUBPPE \
  | 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: 9f20d608205bf7095a7fdfd339d02f790035283b672c76e84a39bfa67db4bbd3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb28bf780858555d05200911d8aa90ba60ba8a2008527edf3d6d3618e8e46c7d",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2025-05-30T15:42:29Z",
    "title_canon_sha256": "50550c55f61d36dc7fe04bd1879730a3179ecfa449850f30f8c7ec3e846497c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.24720",
    "kind": "arxiv",
    "version": 1
  }
}