Pith Number

pith:FR5PUOBR

pith:2015:FR5PUOBRHTYX4IKOGROCHZQJFC

not attested not anchored not stored refs pending

The even Clifford structure of the fourth Severi variety

Maurizio Parton, Paolo Piccinni

arxiv:1506.04624 v1 · 2015-06-15 · math.DG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FR5PUOBRHTYX4IKOGROCHZQJFC}

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	2026-05-18T01:49:25.346937Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c7afa38313cf17e214e345c23e60928bb2b6d69e11e734688c1fca8237de453

Aliases

arxiv: 1506.04624 · arxiv_version: 1506.04624v1 · doi: 10.48550/arxiv.1506.04624 · pith_short_12: FR5PUOBRHTYX · pith_short_16: FR5PUOBRHTYX4IKO · pith_short_8: FR5PUOBR

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/FR5PUOBRHTYX4IKOGROCHZQJFC \
  | 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: 2c7afa38313cf17e214e345c23e60928bb2b6d69e11e734688c1fca8237de453

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5ca5f27826ba86fbc6df14cf1e103bf0e3996c1fc1f21935e3a5306f8c6e7be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2015-06-15T15:02:36Z",
    "title_canon_sha256": "e99640b307fd2cfa0f7fd6b8fb0d750b18cc0613625f1ed7a0b9c62686565b5e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.04624",
    "kind": "arxiv",
    "version": 1
  }
}