Pith Number

pith:LAPKVPIW

pith:2017:LAPKVPIWIB2FVQHWYRSU25SEI3

not attested not anchored not stored refs pending

Non-commutative crepant resolutions for some toric singularities II

Michel Van den Bergh, \v{S}pela \v{S}penko

arxiv:1707.08245 v3 · 2017-07-25 · math.AG · 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{LAPKVPIWIB2FVQHWYRSU25SEI3}

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	2026-05-18T00:10:13.528967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

581eaabd1640745ac0f6c4654d764446dab6eb85dc03b399dbcd723c77f60f8f

Aliases

arxiv: 1707.08245 · arxiv_version: 1707.08245v3 · doi: 10.48550/arxiv.1707.08245 · pith_short_12: LAPKVPIWIB2F · pith_short_16: LAPKVPIWIB2FVQHW · pith_short_8: LAPKVPIW

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/LAPKVPIWIB2FVQHWYRSU25SEI3 \
  | 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: 581eaabd1640745ac0f6c4654d764446dab6eb85dc03b399dbcd723c77f60f8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d940e39b7cfd9006795be9693445c1969c9b431e73eb73040e8b777ff30996d",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-07-25T23:00:44Z",
    "title_canon_sha256": "e8f0e30b7a62890f9a4a227a6b73d58a1596d23b37a4b30db8d33dad1bf358c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.08245",
    "kind": "arxiv",
    "version": 3
  }
}