Pith Number

pith:BZOUYTP4

pith:2017:BZOUYTP44ZW4GFI5CVGV4CJXIT

not attested not anchored not stored refs pending

The blow-up of $\mathbb{P}^4$ at 8 points and its Fano model, via vector bundles on a del Pezzo surface

A. Fanelli, C. Casagrande, G. Codogni

arxiv:1707.09152 v2 · 2017-07-28 · 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{BZOUYTP44ZW4GFI5CVGV4CJXIT}

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	2026-05-18T00:05:39.684957Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e5d4c4dfce66dc3151d154d5e093744c859fc995c34038e33b567e880a684e7

Aliases

arxiv: 1707.09152 · arxiv_version: 1707.09152v2 · doi: 10.48550/arxiv.1707.09152 · pith_short_12: BZOUYTP44ZW4 · pith_short_16: BZOUYTP44ZW4GFI5 · pith_short_8: BZOUYTP4

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/BZOUYTP44ZW4GFI5CVGV4CJXIT \
  | 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: 0e5d4c4dfce66dc3151d154d5e093744c859fc995c34038e33b567e880a684e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba6772efb0eaf6f175545b8ad537999f9c824ddc845e785b30de62e0d53f3327",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-07-28T08:50:28Z",
    "title_canon_sha256": "8a54f56512361f4eaa609687bdc2bb34de5376df00232d215d393121c10f2559"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.09152",
    "kind": "arxiv",
    "version": 2
  }
}