Pith Number

pith:YPCFHO74

pith:2009:YPCFHO74IUZPKIALYFZX72GMID

not attested not anchored not stored refs pending

Quotients of absolute Galois groups which determine the entire Galois cohomology

Ido Efrat, J\'an Min\'a\v{c}, Sunil K. Chebolu

arxiv:0905.1364 v6 · 2009-05-09 · math.GR · math.AT · 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{YPCFHO74IUZPKIALYFZX72GMID}

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	2026-05-18T04:30:37.052502Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3c453bbfc4532f5200bc1737fe8cc40de2aed584f78bf7a8b9c5738f71a5121

Aliases

arxiv: 0905.1364 · arxiv_version: 0905.1364v6 · doi: 10.48550/arxiv.0905.1364 · pith_short_12: YPCFHO74IUZP · pith_short_16: YPCFHO74IUZPKIAL · pith_short_8: YPCFHO74

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/YPCFHO74IUZPKIALYFZX72GMID \
  | 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: c3c453bbfc4532f5200bc1737fe8cc40de2aed584f78bf7a8b9c5738f71a5121

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d13c7a7cafb3f5ead981358ac7d65db39b70d3280d4611477063ab40af7f77c",
    "cross_cats_sorted": [
      "math.AT",
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2009-05-09T02:21:24Z",
    "title_canon_sha256": "8a9d9c5cc5dd5e54ae64609a2032dd53622c9d125e4393b4e7ea0fbfaaf192d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1364",
    "kind": "arxiv",
    "version": 6
  }
}