Pith Number

pith:GYBELMQ5

pith:2012:GYBELMQ5QZMFQDAWUA2C4JUHQS

not attested not anchored not stored refs pending

Remarks On the Topology of the Fano surface

Alberto Collino (Dipartimento di Matematica, Universit\'a di Torino)

arxiv:1211.2621 v2 · 2012-11-12 · 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{GYBELMQ5QZMFQDAWUA2C4JUHQS}

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	2026-05-18T02:53:54.042673Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

360245b21d8658580c16a0342e2687848d83b61c4299705136ae53d0289bc5e0

Aliases

arxiv: 1211.2621 · arxiv_version: 1211.2621v2 · doi: 10.48550/arxiv.1211.2621 · pith_short_12: GYBELMQ5QZMF · pith_short_16: GYBELMQ5QZMFQDAW · pith_short_8: GYBELMQ5

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/GYBELMQ5QZMFQDAWUA2C4JUHQS \
  | 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: 360245b21d8658580c16a0342e2687848d83b61c4299705136ae53d0289bc5e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df284425eb774ba8619bfc5db18097e720b1d9609ee72985bc2e95d2f74d50a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-11-12T14:05:34Z",
    "title_canon_sha256": "4db1ea89b07bd96f0cfb4ae0a60c8884fa4025286119e470ecd54b050e147aa1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2621",
    "kind": "arxiv",
    "version": 2
  }
}