Pith Number

pith:YD7VFVT6

pith:2026:YD7VFVT6HYGG7Y5D7IGIZXIAQO

not attested not anchored not stored refs pending

Irreducible symplectic varieties via K3-del Pezzo double covers

Riccardo Carini

arxiv:2606.18357 v1 · 2026-06-16 · 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{YD7VFVT6HYGG7Y5D7IGIZXIAQO}

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	2026-06-19T16:10:58.987204Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c0ff52d67e3e0c6fe3a3fa0c8cdd0083b04be60c373ff18e340460f1c7f822dc

Aliases

arxiv: 2606.18357 · arxiv_version: 2606.18357v1 · doi: 10.48550/arxiv.2606.18357 · pith_short_12: YD7VFVT6HYGG · pith_short_16: YD7VFVT6HYGG7Y5D · pith_short_8: YD7VFVT6

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/YD7VFVT6HYGG7Y5D7IGIZXIAQO \
  | 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: c0ff52d67e3e0c6fe3a3fa0c8cdd0083b04be60c373ff18e340460f1c7f822dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d394c8fa2d439915212647db8f530f2a7b2ffc6464d05fc4f7f565edca8250d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-06-16T18:04:53Z",
    "title_canon_sha256": "18af992a8e4ee1ce0d9a1acc367f364f0b38c759131d7c06992d4f64683077d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.18357",
    "kind": "arxiv",
    "version": 1
  }
}