Pith Number

pith:7IVKE4QZ

pith:2009:7IVKE4QZNS7P544MVGEJSMAXUV

not attested not anchored not stored refs pending

On Cox rings of K3-surfaces

Antonio Laface, Juergen Hausen, Michela Artebani

arxiv:0901.0369 v3 · 2009-01-04 · 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{7IVKE4QZNS7P544MVGEJSMAXUV}

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	2026-05-17T23:53:37.163803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa2aa272196cbefef38ca988993017a5617ade1f078e336acf774d6a2592f8af

Aliases

arxiv: 0901.0369 · arxiv_version: 0901.0369v3 · doi: 10.48550/arxiv.0901.0369 · pith_short_12: 7IVKE4QZNS7P · pith_short_16: 7IVKE4QZNS7P544M · pith_short_8: 7IVKE4QZ

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/7IVKE4QZNS7P544MVGEJSMAXUV \
  | 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: fa2aa272196cbefef38ca988993017a5617ade1f078e336acf774d6a2592f8af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "deae90ba0f7b7a0249137118a9f7b320d3f102fb0e18cf2f93e4e47bb0bd0d8b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-01-04T12:03:26Z",
    "title_canon_sha256": "4e09bb86055f27699c3f593d236a0aeac86262c5c8a7a7938f321f37eb34033f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.0369",
    "kind": "arxiv",
    "version": 3
  }
}