Pith Number

pith:6PQ3Z6N6

pith:2016:6PQ3Z6N6XHDMOT4XMZBNB26LUQ

not attested not anchored not stored refs pending

Log Fano structures and Cox rings of blow-ups of products of projective spaces

Jinhyung Park, John Lesieutre

arxiv:1604.07140 v2 · 2016-04-25 · 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{6PQ3Z6N6XHDMOT4XMZBNB26LUQ}

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	2026-05-18T00:45:58.804127Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3e1bcf9beb9c6c74f976642d0ebcba43b637cf5c1019c6de304e4ef1c92d055

Aliases

arxiv: 1604.07140 · arxiv_version: 1604.07140v2 · doi: 10.48550/arxiv.1604.07140 · pith_short_12: 6PQ3Z6N6XHDM · pith_short_16: 6PQ3Z6N6XHDMOT4X · pith_short_8: 6PQ3Z6N6

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/6PQ3Z6N6XHDMOT4XMZBNB26LUQ \
  | 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: f3e1bcf9beb9c6c74f976642d0ebcba43b637cf5c1019c6de304e4ef1c92d055

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ad1bcdcd4e00bf9bc2dcf1e1acc2c26239e9e86b67c9609ba49b5d91a4094dd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-04-25T06:35:26Z",
    "title_canon_sha256": "3ee7bceaa51887839a376454349daaef7e63e2681fe88f22623afcbf17580429"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.07140",
    "kind": "arxiv",
    "version": 2
  }
}