Pith Number

pith:K4SBBSUT

pith:2007:K4SBBSUTOFZFTZ37F74GDX3ZMW

not attested not anchored not stored refs pending

Severi varieties and self rational maps of K3 surfaces

Thomas Dedieu

arxiv:0704.3163 v1 · 2007-04-24 · 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{K4SBBSUTOFZFTZ37F74GDX3ZMW}

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	2026-05-18T04:40:46.603979Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

572410ca93717259e77f2ff861df7965b7ea59bace164e4eff30737d30d9748b

Aliases

arxiv: 0704.3163 · arxiv_version: 0704.3163v1 · doi: 10.48550/arxiv.0704.3163 · pith_short_12: K4SBBSUTOFZF · pith_short_16: K4SBBSUTOFZFTZ37 · pith_short_8: K4SBBSUT

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/K4SBBSUTOFZFTZ37F74GDX3ZMW \
  | 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: 572410ca93717259e77f2ff861df7965b7ea59bace164e4eff30737d30d9748b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea41c6c34867a6c4a8aff2b6cee5ff0e7727e7d3a2f35217cfded0666ff62e16",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2007-04-24T11:15:22Z",
    "title_canon_sha256": "ca435d60c7a7385aeeb306c4b5338f2cf11cde4025d5c685f49e6fe41620b652"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0704.3163",
    "kind": "arxiv",
    "version": 1
  }
}