Pith Number

pith:VMQU7ZP5

pith:2026:VMQU7ZP5QDB5POO4IRO27R7DWJ

not attested not anchored not stored refs pending

Constant cycle surfaces on Fano varieties of cubic fourfolds

Jiexiang Huang

arxiv:2606.18253 v1 · 2026-04-27 · 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{VMQU7ZP5QDB5POO4IRO27R7DWJ}

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	2026-06-19T16:10:56.149623Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab214fe5fd80c3d7b9dc445dafc7e3b278c81e2811ac96a359ed399ece778330

Aliases

arxiv: 2606.18253 · arxiv_version: 2606.18253v1 · doi: 10.48550/arxiv.2606.18253 · pith_short_12: VMQU7ZP5QDB5 · pith_short_16: VMQU7ZP5QDB5POO4 · pith_short_8: VMQU7ZP5

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/VMQU7ZP5QDB5POO4IRO27R7DWJ \
  | 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: ab214fe5fd80c3d7b9dc445dafc7e3b278c81e2811ac96a359ed399ece778330

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "309de35f3f279d3dcd5514aeb3ce032763b5e35202300ab2bfa75277b7304d50",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-04-27T01:49:28Z",
    "title_canon_sha256": "2018c2fc6a62384b88e3209c395760bdcd30de9a6554cce728f3202698cd6338"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.18253",
    "kind": "arxiv",
    "version": 1
  }
}