Pith Number

pith:NYUJFPY2

pith:1997:NYUJFPY2DGZEFOCIX2WORJVBWV

not attested not anchored not stored refs pending

Desingularized moduli spaces of sheaves on a K3, I

Kieran G. O'Grady

arxiv:alg-geom/9708009 v2 · 1997-08-06 · alg-geom · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NYUJFPY2DGZEFOCIX2WORJVBWV}

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	2026-05-18T01:07:47.045386Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e2892bf1a19b242b848beace8a6a1b57599a320b230c397ab6dbe687f3509c2

Aliases

arxiv: alg-geom/9708009 · arxiv_version: alg-geom/9708009v2 · doi: 10.48550/arxiv.alg-geom/9708009 · pith_short_12: NYUJFPY2DGZE · pith_short_16: NYUJFPY2DGZEFOCI · pith_short_8: NYUJFPY2

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/NYUJFPY2DGZEFOCIX2WORJVBWV \
  | 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: 6e2892bf1a19b242b848beace8a6a1b57599a320b230c397ab6dbe687f3509c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2551d3ebe7ceec9ae52132141c99afb675e2871d8ec478e92d8e4a2ba9ae856c",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "",
    "primary_cat": "alg-geom",
    "submitted_at": "1997-08-06T08:47:43Z",
    "title_canon_sha256": "07e320b6c3566571440b7d6c9dce9b19362bc8a32054e2417c481a3a26b0eae4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "alg-geom/9708009",
    "kind": "arxiv",
    "version": 2
  }
}