Pith Number

pith:SRDU5HQ6

pith:2017:SRDU5HQ6VROYLRK3XZCPKPOS4U

not attested not anchored not stored refs pending

Singularities of Fano varieties of lines on singular cubic fourfolds

Ryo Yamagishi

arxiv:1712.03546 v2 · 2017-12-10 · 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{SRDU5HQ6VROYLRK3XZCPKPOS4U}

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	2026-05-18T00:19:41.360906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94474e9e1eac5d85c55bbe44f53dd2e5091d0f4f78fe7242f7ff857fb8482d87

Aliases

arxiv: 1712.03546 · arxiv_version: 1712.03546v2 · doi: 10.48550/arxiv.1712.03546 · pith_short_12: SRDU5HQ6VROY · pith_short_16: SRDU5HQ6VROYLRK3 · pith_short_8: SRDU5HQ6

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/SRDU5HQ6VROYLRK3XZCPKPOS4U \
  | 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: 94474e9e1eac5d85c55bbe44f53dd2e5091d0f4f78fe7242f7ff857fb8482d87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a76650e512852067ca65660dd63226411b11b35ffeb50d8fc065559fceff12d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-12-10T15:01:33Z",
    "title_canon_sha256": "c35e6316db3f4fa9a5bde9213a8ab141e0eb64e70bc16e9c47b29303af126b81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.03546",
    "kind": "arxiv",
    "version": 2
  }
}