Pith Number

pith:Z4QCVK7U

pith:2015:Z4QCVK7U2E46OOFJ6U4LSLDR2W

not attested not anchored not stored refs pending

On hyperplane sections of K3 surfaces

Andrea Bruno, Edoardo Sernesi, Enrico Arbarello

arxiv:1507.05002 v3 · 2015-07-17 · 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{Z4QCVK7U2E46OOFJ6U4LSLDR2W}

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	2026-05-18T00:59:26.630380Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf202aabf4d139e738a9f538b92c71d595e4e4e76c22b17d5ccaa9ae7f3a9233

Aliases

arxiv: 1507.05002 · arxiv_version: 1507.05002v3 · doi: 10.48550/arxiv.1507.05002 · pith_short_12: Z4QCVK7U2E46 · pith_short_16: Z4QCVK7U2E46OOFJ · pith_short_8: Z4QCVK7U

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/Z4QCVK7U2E46OOFJ6U4LSLDR2W \
  | 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: cf202aabf4d139e738a9f538b92c71d595e4e4e76c22b17d5ccaa9ae7f3a9233

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9ce93dfc4f9348377f870dd28ac348f0c00e313aac3f04c8d9a00cd5260a663",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-07-17T15:54:55Z",
    "title_canon_sha256": "fdd90eaa72cae4e04149edd30fcda91cc92080d267d09031dd3c2f045a7575e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.05002",
    "kind": "arxiv",
    "version": 3
  }
}