Pith Number

pith:E7NADBJM

pith:2009:E7NADBJMSK7CXCINP4MNPX2FVL

not attested not anchored not stored refs pending

Hochschild cohomology of group extensions of quantum symmetric algebras

Deepak Naidu, Piyush Shroff, Sarah Witherspoon

arxiv:0911.3696 v2 · 2009-11-19 · math.RA · math.QA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E7NADBJMSK7CXCINP4MNPX2FVL}

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	2026-05-18T04:23:03.242620Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27da01852c92be2b890d7f18d7df45aadaaec78120f96d5a5ac6e88539307e5d

Aliases

arxiv: 0911.3696 · arxiv_version: 0911.3696v2 · doi: 10.48550/arxiv.0911.3696 · pith_short_12: E7NADBJMSK7C · pith_short_16: E7NADBJMSK7CXCIN · pith_short_8: E7NADBJM

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/E7NADBJMSK7CXCINP4MNPX2FVL \
  | 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: 27da01852c92be2b890d7f18d7df45aadaaec78120f96d5a5ac6e88539307e5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "999ad9e1c9fad14a12d79c110f8aa873b310ebc24f3e366c771e32e25f893501",
    "cross_cats_sorted": [
      "math.QA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2009-11-19T03:33:17Z",
    "title_canon_sha256": "5329cfd87779ef69c19fde2f33007cba171bcc5e85e3cd797605fedb7d009d33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.3696",
    "kind": "arxiv",
    "version": 2
  }
}