Pith Number

pith:EMKRGVVA

pith:2011:EMKRGVVACWQPQWKYTB6BMJK2VH

not attested not anchored not stored refs pending

Motivic rigidity of Severi-Brauer varieties

Charles De Clercq

arxiv:1105.4981 v3 · 2011-05-25 · 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{EMKRGVVACWQPQWKYTB6BMJK2VH}

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	2026-05-18T03:43:42.586273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23151356a015a0f85958987c16255aa9eee2d7e201c90cd31e55a88a4c0ea0d3

Aliases

arxiv: 1105.4981 · arxiv_version: 1105.4981v3 · doi: 10.48550/arxiv.1105.4981 · pith_short_12: EMKRGVVACWQP · pith_short_16: EMKRGVVACWQPQWKY · pith_short_8: EMKRGVVA

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/EMKRGVVACWQPQWKYTB6BMJK2VH \
  | 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: 23151356a015a0f85958987c16255aa9eee2d7e201c90cd31e55a88a4c0ea0d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66118fd438fb6a5b563981d1cf48ab4266ba00dc448a3e139451ee06f63dd0bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2011-05-25T09:56:39Z",
    "title_canon_sha256": "ef940d0afc76455e5378475fb15cdeba1287630e71ac2bebcfe4cad9907e384d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4981",
    "kind": "arxiv",
    "version": 3
  }
}