Pith Number

pith:BB7VLNQJ

pith:2018:BB7VLNQJBD5H7EAIUTN3EGL6C6

not attested not anchored not stored refs pending

The Brauer Group of a Surface over a Finite Field

Yuri G. Zarhin

arxiv:1802.01776 v1 · 2018-02-06 · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BB7VLNQJBD5H7EAIUTN3EGL6C6}

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	2026-05-18T00:24:21.331540Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

087f55b60908fa7f9008a4dbb2197e17a67ba5d7e0002b6e310a0ac1cb61a70f

Aliases

arxiv: 1802.01776 · arxiv_version: 1802.01776v1 · doi: 10.48550/arxiv.1802.01776 · pith_short_12: BB7VLNQJBD5H · pith_short_16: BB7VLNQJBD5H7EAI · pith_short_8: BB7VLNQJ

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/BB7VLNQJBD5H7EAIUTN3EGL6C6 \
  | 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: 087f55b60908fa7f9008a4dbb2197e17a67ba5d7e0002b6e310a0ac1cb61a70f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "742bd11f60c14ea8980bff457ac7061e536f1c9be83385189dd23c1443c8eb34",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2018-02-06T03:13:58Z",
    "title_canon_sha256": "978900915d5454d13575b139dd796201b38c07c354b0460c51cc2b7e2b22e2a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.01776",
    "kind": "arxiv",
    "version": 1
  }
}