Pith Number

pith:KOTFN3AW

pith:2015:KOTFN3AWUJAPKZ6GBNUM33TLGQ

not attested not anchored not stored refs pending

Surfaces of globally $F$-regular type are of Fano type

Shinnosuke Okawa

arxiv:1506.04900 v1 · 2015-06-16 · 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{KOTFN3AWUJAPKZ6GBNUM33TLGQ}

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	2026-05-18T01:48:05.564957Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53a656ec16a240f567c60b68cdee6b3426800389b073de1f36a9d5c14b2a8ba0

Aliases

arxiv: 1506.04900 · arxiv_version: 1506.04900v1 · doi: 10.48550/arxiv.1506.04900 · pith_short_12: KOTFN3AWUJAP · pith_short_16: KOTFN3AWUJAPKZ6G · pith_short_8: KOTFN3AW

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/KOTFN3AWUJAPKZ6GBNUM33TLGQ \
  | 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: 53a656ec16a240f567c60b68cdee6b3426800389b073de1f36a9d5c14b2a8ba0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2597c2025ad16e2b385b35c694fa5171279583ddd80636977966884c6f899dcb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-06-16T10:23:45Z",
    "title_canon_sha256": "0eba5590b098da3ef2a694842e043d9cd9ecd4cd1999386a3e1f6a3abe40aa4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.04900",
    "kind": "arxiv",
    "version": 1
  }
}