Pith Number

pith:6AWLKUPV

pith:2013:6AWLKUPVXFJAIYR7NIUIB6YNVU

not attested not anchored not stored refs pending

An algorithm to compute automorphism groups of K3 surfaces and an application to singular K3 surfaces

Ichiro Shimada

arxiv:1304.7427 v6 · 2013-04-28 · 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{6AWLKUPVXFJAIYR7NIUIB6YNVU}

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	2026-05-18T02:27:49.673821Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f02cb551f5b95204623f6a2880fb0dad3eb88db21ae284b20c1f4ee55c033973

Aliases

arxiv: 1304.7427 · arxiv_version: 1304.7427v6 · doi: 10.48550/arxiv.1304.7427 · pith_short_12: 6AWLKUPVXFJA · pith_short_16: 6AWLKUPVXFJAIYR7 · pith_short_8: 6AWLKUPV

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/6AWLKUPVXFJAIYR7NIUIB6YNVU \
  | 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: f02cb551f5b95204623f6a2880fb0dad3eb88db21ae284b20c1f4ee55c033973

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da3856b4463804417ee46a6786845322fd3a811771110f4c8ae6651175be82dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-04-28T04:10:20Z",
    "title_canon_sha256": "14bf374f291637b72a12f887c6345b52331216bb4080d62cbcf6a7df2f90c08e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.7427",
    "kind": "arxiv",
    "version": 6
  }
}