Pith Number

pith:XYLUC5QA

pith:2019:XYLUC5QASDGZDGI6RX534PFAL4

not attested not anchored not stored refs pending

\'Etale groupoid algebras with coefficients in a sheaf and skew inverse semigroup rings

Benjamin Steinberg, Daniel Gon\c{c}alves

arxiv:1906.06952 v1 · 2019-06-17 · math.RA · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XYLUC5QASDGZDGI6RX534PFAL4}

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	2026-05-17T23:43:12.253276Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be1741760090cd91991e8dfbbe3ca05f269018bc9213fa32d25ce7552336502b

Aliases

arxiv: 1906.06952 · arxiv_version: 1906.06952v1 · doi: 10.48550/arxiv.1906.06952 · pith_short_12: XYLUC5QASDGZ · pith_short_16: XYLUC5QASDGZDGI6 · pith_short_8: XYLUC5QA

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/XYLUC5QASDGZDGI6RX534PFAL4 \
  | 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: be1741760090cd91991e8dfbbe3ca05f269018bc9213fa32d25ce7552336502b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa16ff9ce70aef034f16c8e80d5f0ef4a9779dc130486f6b4c43aceec60b9a49",
    "cross_cats_sorted": [
      "math.OA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2019-06-17T11:13:02Z",
    "title_canon_sha256": "1dd01b88d128396731ca8c8b08e6b0cd9fd0bc807e94b508e819d80e6059f78a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.06952",
    "kind": "arxiv",
    "version": 1
  }
}