Pith Number

pith:H43QA7RK

pith:2015:H43QA7RK5CHFGPUOIBGTLP7AB4

not attested not anchored not stored refs pending

Graded semisimple algebras are symmetric

Constantin Nastasescu, Laura Nastasescu, Sorin Dascalescu

arxiv:1504.04868 v2 · 2015-04-19 · 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{H43QA7RK5CHFGPUOIBGTLP7AB4}

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	2026-05-18T00:39:53.165002Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f37007e2ae88e533e8e404d35bfe00f03cca17d000c2cf3007a256996ce3391

Aliases

arxiv: 1504.04868 · arxiv_version: 1504.04868v2 · doi: 10.48550/arxiv.1504.04868 · pith_short_12: H43QA7RK5CHF · pith_short_16: H43QA7RK5CHFGPUO · pith_short_8: H43QA7RK

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/H43QA7RK5CHFGPUOIBGTLP7AB4 \
  | 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: 3f37007e2ae88e533e8e404d35bfe00f03cca17d000c2cf3007a256996ce3391

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "989dc3e7819bc3551508bd9454ef5243aeb40a3f124d9880cc04059789b840dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2015-04-19T18:46:45Z",
    "title_canon_sha256": "e74eb07cf77f62484acad979a046c180ad27c281eb4b914cfe9511bf93c04ccc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.04868",
    "kind": "arxiv",
    "version": 2
  }
}