Pith Number

pith:TH6S42DY

pith:2016:TH6S42DY2CLGRIQOSOAI3GXADZ

not attested not anchored not stored refs pending

Klt del Pezzo surfaces which are not globally F-split

Hiromu Tanaka, Jakub Witaszek, Paolo Cascini

arxiv:1601.03578 v1 · 2016-01-14 · 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{TH6S42DY2CLGRIQOSOAI3GXADZ}

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	2026-05-18T01:22:53.114432Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99fd2e6878d09668a20e93808d9ae01e4bd62507c07af7e9bfbc7992d0395cb3

Aliases

arxiv: 1601.03578 · arxiv_version: 1601.03578v1 · doi: 10.48550/arxiv.1601.03578 · pith_short_12: TH6S42DY2CLG · pith_short_16: TH6S42DY2CLGRIQO · pith_short_8: TH6S42DY

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/TH6S42DY2CLGRIQOSOAI3GXADZ \
  | 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: 99fd2e6878d09668a20e93808d9ae01e4bd62507c07af7e9bfbc7992d0395cb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bffbaa89095bf814a35f19b761f8c1a4965a80e73f1e0a1c1ee945e9d2c4ad28",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-01-14T12:17:33Z",
    "title_canon_sha256": "185fac85bb46d6e1e287ce6465fdac8aed5c1da1797bffdf929ec308606a9316"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.03578",
    "kind": "arxiv",
    "version": 1
  }
}