Pith Number

pith:QEOR2AB6

pith:2021:QEOR2AB6FY6R5X6OM3NN2YNTTW

not attested not anchored not stored refs pending

Cohomological Obstructions and Weak Crossed Products over Weak Hopf Algebras

Ana Bel\'en Rodr\'iguez Raposo, Ram\'on Gonz\'alez Rodr\'iguez

arxiv:2105.02528 v1 · 2021-05-06 · 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{QEOR2AB6FY6R5X6OM3NN2YNTTW}

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	2026-07-05T02:38:02.073363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

811d1d003e2e3d1edfce66dadd61b39da1cd5365e73079a1857a62744ea4ebf3

Aliases

arxiv: 2105.02528 · arxiv_version: 2105.02528v1 · doi: 10.48550/arxiv.2105.02528 · pith_short_12: QEOR2AB6FY6R · pith_short_16: QEOR2AB6FY6R5X6O · pith_short_8: QEOR2AB6

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/QEOR2AB6FY6R5X6OM3NN2YNTTW \
  | 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: 811d1d003e2e3d1edfce66dadd61b39da1cd5365e73079a1857a62744ea4ebf3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7c160a4b4b031b74228fb0691f4c817134ee7f20b42a61f60cd3fdcc069faf6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2021-05-06T09:02:19Z",
    "title_canon_sha256": "0809b55ad21ecdccda0bde9c39e95b501adfef5132d7005fa34fb95445acf33a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.02528",
    "kind": "arxiv",
    "version": 1
  }
}