Pith Number

pith:RNA5SFPJ

pith:2009:RNA5SFPJRNNZOMFFCSVA4QTZAX

not attested not anchored not stored refs pending

The 2-Factoriality of the O'Grady Moduli Spaces

Arvid Perego

arxiv:0903.3211 v1 · 2009-03-18 · 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{RNA5SFPJRNNZOMFFCSVA4QTZAX}

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	2026-05-18T02:57:34.148441Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8b41d915e98b5b9730a514aa0e427905ca91e4450c39c2ec4c7eba228827eed6

Aliases

arxiv: 0903.3211 · arxiv_version: 0903.3211v1 · doi: 10.48550/arxiv.0903.3211 · pith_short_12: RNA5SFPJRNNZ · pith_short_16: RNA5SFPJRNNZOMFF · pith_short_8: RNA5SFPJ

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/RNA5SFPJRNNZOMFFCSVA4QTZAX \
  | 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: 8b41d915e98b5b9730a514aa0e427905ca91e4450c39c2ec4c7eba228827eed6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d366d1b17b661aecae444626df27c67bf5b2d9880d3ae4d28dbef45865271cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-03-18T17:55:56Z",
    "title_canon_sha256": "06bf2dc01c53ac04283a96676f91b8307b84d6d60daf5167ba31216ed783d5d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3211",
    "kind": "arxiv",
    "version": 1
  }
}