Pith Number

pith:QIGCZIGN

pith:2013:QIGCZIGNPSF4CHAP227ZFHZUFQ

not attested not anchored not stored refs pending

Vanishing of self-extensions over symmetric algebras

Kosmas Diveris, Marju Purin

arxiv:1309.1088 v1 · 2013-09-04 · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QIGCZIGNPSF4CHAP227ZFHZUFQ}

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	2026-05-18T03:07:42.137750Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

820c2ca0cd7c8bc11c0fd6bf929f342c0fd077c2b6bc84faaa7cb8b8cc681435

Aliases

arxiv: 1309.1088 · arxiv_version: 1309.1088v1 · doi: 10.48550/arxiv.1309.1088 · pith_short_12: QIGCZIGNPSF4 · pith_short_16: QIGCZIGNPSF4CHAP · pith_short_8: QIGCZIGN

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/QIGCZIGNPSF4CHAP227ZFHZUFQ \
  | 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: 820c2ca0cd7c8bc11c0fd6bf929f342c0fd077c2b6bc84faaa7cb8b8cc681435

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1a6b0c02d0e3ed5a12162b9697f3e1332a9aa680d4327fe17cddca6f4cfc4b1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RT",
    "submitted_at": "2013-09-04T16:16:33Z",
    "title_canon_sha256": "fa3a69889021a0d0a60dc41448c134f3746545a8852516084f9b21135138ed67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.1088",
    "kind": "arxiv",
    "version": 1
  }
}