Pith Number

pith:IPRX4BKM

pith:2018:IPRX4BKMXTUWUQLFKE5HWS6F7N

not attested not anchored not stored refs pending

Orthogonal involutions on central simple algebras and function fields of Severi-Brauer varieties

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

arxiv:1807.07045 v1 · 2018-07-18 · math.GR · math.KT · 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{IPRX4BKMXTUWUQLFKE5HWS6F7N}

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	2026-05-18T00:10:24.998587Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43e37e054cbce96a4165513a7b4bc5fb56105c3f47f687dc01a04ad74c9b2282

Aliases

arxiv: 1807.07045 · arxiv_version: 1807.07045v1 · doi: 10.48550/arxiv.1807.07045 · pith_short_12: IPRX4BKMXTUW · pith_short_16: IPRX4BKMXTUWUQLF · pith_short_8: IPRX4BKM

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/IPRX4BKMXTUWUQLFKE5HWS6F7N \
  | 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: 43e37e054cbce96a4165513a7b4bc5fb56105c3f47f687dc01a04ad74c9b2282

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "449997fac8678454310591458f49078ea5a2c7b9dd06ca3385ac91610bc2e347",
    "cross_cats_sorted": [
      "math.KT",
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2018-07-18T17:18:49Z",
    "title_canon_sha256": "4a25944a77a4af26c3482c0f2f1967757d9a6d77e334b5ad60e8a542a04d5e23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.07045",
    "kind": "arxiv",
    "version": 1
  }
}