Pith Number

pith:SFCNI36R

pith:2012:SFCNI36RA5HWPH3TYYPJPCQZ4C

not attested not anchored not stored refs pending

Pairwise incident planes and hyperkaehler four-folds

Kieran G. O'Grady

arxiv:1204.6257 v1 · 2012-04-27 · 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{SFCNI36RA5HWPH3TYYPJPCQZ4C}

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	2026-05-18T03:56:46.609689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9144d46fd1074f679f73c61e978a19e0b533a27aeed39deb15fc7bc6a0b247ee

Aliases

arxiv: 1204.6257 · arxiv_version: 1204.6257v1 · doi: 10.48550/arxiv.1204.6257 · pith_short_12: SFCNI36RA5HW · pith_short_16: SFCNI36RA5HWPH3T · pith_short_8: SFCNI36R

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/SFCNI36RA5HWPH3TYYPJPCQZ4C \
  | 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: 9144d46fd1074f679f73c61e978a19e0b533a27aeed39deb15fc7bc6a0b247ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5cec044f7ec99c47a663e633a4eb4d776258aec37676ce86d4e1a3389fc3c87f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-04-27T15:49:42Z",
    "title_canon_sha256": "afe808a6c67d013f9a1203496ec0d7d681034ff5177142ed19b2f09f7ca42182"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.6257",
    "kind": "arxiv",
    "version": 1
  }
}