Pith Number

pith:IFF7CUH7

pith:2023:IFF7CUH72SNGDG5TLQF4532ECI

not attested not anchored not stored refs pending

Witt groups of Severi-Brauer varieties and of function fields of conics

Anne Qu\'eguiner-Mathieu, Jean-Pierre Tignol

arxiv:2304.03539 v4 · 2023-04-07 · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IFF7CUH72SNGDG5TLQF4532ECI}

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	2026-05-20T14:03:16.465949Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

414bf150ffd49a619bb35c0bceef441218b1bef455964fc91c7170aa28fe98c2

Aliases

arxiv: 2304.03539 · arxiv_version: 2304.03539v4 · doi: 10.48550/arxiv.2304.03539 · pith_short_12: IFF7CUH72SNG · pith_short_16: IFF7CUH72SNGDG5T · pith_short_8: IFF7CUH7

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/IFF7CUH72SNGDG5TLQF4532ECI \
  | 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: 414bf150ffd49a619bb35c0bceef441218b1bef455964fc91c7170aa28fe98c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80b01497e622cd3ee4a80aa9ca9e2fea839ca6b3225e3f1f788c898a1cb156a7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2023-04-07T08:32:57Z",
    "title_canon_sha256": "bbab3d23dae26fb7ffbfd948eabbfb0f53ca06963f5dfb323dd38685e4eadbac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2304.03539",
    "kind": "arxiv",
    "version": 4
  }
}