Pith Number

pith:IAIV4COR

pith:1997:IAIV4CORW2BIL5JHVJDEXXU7KQ

not attested not anchored not stored refs pending

Hochschild cohomology and characteristic classes for star-products

Alan Weinstein, Ping Xu

arxiv:q-alg/9709043 v2 · 1997-09-30 · q-alg · dg-ga · math.DG · 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{IAIV4CORW2BIL5JHVJDEXXU7KQ}

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	2026-07-04T15:08:19.908663Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

40115e09d1b68285f527aa464bde9f5411cb6722670afb7a747140fd93dca05e

Aliases

arxiv: q-alg/9709043 · arxiv_version: q-alg/9709043v2 · doi: 10.48550/arxiv.q-alg/9709043 · pith_short_12: IAIV4CORW2BI · pith_short_16: IAIV4CORW2BIL5JH · pith_short_8: IAIV4COR

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/IAIV4CORW2BIL5JHVJDEXXU7KQ \
  | 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: 40115e09d1b68285f527aa464bde9f5411cb6722670afb7a747140fd93dca05e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fb9405696dd1769046dbc86bb8db3cec40022b823ea5655ecd2038a04642a65",
    "cross_cats_sorted": [
      "dg-ga",
      "math.DG",
      "math.QA"
    ],
    "license": "",
    "primary_cat": "q-alg",
    "submitted_at": "1997-09-30T21:52:31Z",
    "title_canon_sha256": "2037074281a644518239068a7f20051e532d74d10d6e270239051d170c1d7dff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "q-alg/9709043",
    "kind": "arxiv",
    "version": 2
  }
}