Pith Number

pith:QMAAPY5R

pith:2006:QMAAPY5RJNTLBF7V423PBEPO2M

not attested not anchored not stored refs pending

Hochschild cohomology via incidence algebras

Maria Julia Redondo

arxiv:math/0611542 v3 · 2006-11-17 · math.RT · 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{QMAAPY5RJNTLBF7V423PBEPO2M}

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	2026-05-18T04:38:05.136787Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

830007e3b14b66b097f5e6b6f091eed300c634a79cedd331a23ad2f97144b931

Aliases

arxiv: math/0611542 · arxiv_version: math/0611542v3 · doi: 10.48550/arxiv.math/0611542 · pith_short_12: QMAAPY5RJNTL · pith_short_16: QMAAPY5RJNTLBF7V · pith_short_8: QMAAPY5R

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/QMAAPY5RJNTLBF7V423PBEPO2M \
  | 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: 830007e3b14b66b097f5e6b6f091eed300c634a79cedd331a23ad2f97144b931

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "376afef4fd9dd482d119ca24350b58af2c58d27941c4c8e06822fa878a3fa2e9",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "",
    "primary_cat": "math.RT",
    "submitted_at": "2006-11-17T20:21:06Z",
    "title_canon_sha256": "013240b8ad5b2b069a9a5e954b6b82ed3a839ad43b1bc8f3f20872b54f57f8b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0611542",
    "kind": "arxiv",
    "version": 3
  }
}