Pith Number

pith:QPAHM3PS

pith:2011:QPAHM3PSG3Z27CZPUXJ7I7RTDH

not attested not anchored not stored refs pending

Tame Covers and Cohomology of Relative Curves over Complete Discrete Valuation Rings, with Applications to the Brauer Group

Eduardo Tengan, Eric Brussel

arxiv:1104.0439 v2 · 2011-04-03 · math.NT · 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{QPAHM3PSG3Z27CZPUXJ7I7RTDH}

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	2026-05-18T04:09:25.245951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83c0766df236f3af8b2fa5d3f47e3319fafd74e32e8aa480982538181e360fc0

Aliases

arxiv: 1104.0439 · arxiv_version: 1104.0439v2 · doi: 10.48550/arxiv.1104.0439 · pith_short_12: QPAHM3PSG3Z2 · pith_short_16: QPAHM3PSG3Z27CZP · pith_short_8: QPAHM3PS

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/QPAHM3PSG3Z27CZPUXJ7I7RTDH \
  | 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: 83c0766df236f3af8b2fa5d3f47e3319fafd74e32e8aa480982538181e360fc0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a9b0a84a86c9c9fc8dcc6bbfd6b65c243ce07329c230d998157347deb338820",
    "cross_cats_sorted": [
      "math.AG",
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2011-04-03T23:55:24Z",
    "title_canon_sha256": "692ffff1ce5f980efc6c96b8af95c2216ad88814b61e1244a49e5f7d89ff135d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.0439",
    "kind": "arxiv",
    "version": 2
  }
}