Pith Number

pith:X3EFXCJK

pith:2013:X3EFXCJK7KZ3IJB5MIVPXU2DSF

not attested not anchored not stored refs pending

The cone of curves of K3 surfaces revisted

S\'andor J Kov\'acs

arxiv:1309.5562 v1 · 2013-09-22 · 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{X3EFXCJK7KZ3IJB5MIVPXU2DSF}

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	2026-05-18T03:12:35.973191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bec85b892afab3b4243d622afbd3439176674686f3aff9c6fda3e2b28cd21947

Aliases

arxiv: 1309.5562 · arxiv_version: 1309.5562v1 · doi: 10.48550/arxiv.1309.5562 · pith_short_12: X3EFXCJK7KZ3 · pith_short_16: X3EFXCJK7KZ3IJB5 · pith_short_8: X3EFXCJK

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/X3EFXCJK7KZ3IJB5MIVPXU2DSF \
  | 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: bec85b892afab3b4243d622afbd3439176674686f3aff9c6fda3e2b28cd21947

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba1f5e3b90161e7ad3fa44b624cfb9cf705a609f56bf33971e4246e042b495f8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-09-22T06:01:33Z",
    "title_canon_sha256": "6b2fc898e8611333837758b6dd772c67973c9a463e574245b6b4384270411fb4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.5562",
    "kind": "arxiv",
    "version": 1
  }
}