Pith Number

pith:IF7I7AMK

pith:2014:IF7I7AMKSDWYVEONGVOTPOU7I4

not attested not anchored not stored refs pending

Unirationality of del Pezzo surfaces of degree two over finite fields (extended version)

Dino Festi, Ronald van Luijk

arxiv:1408.0269 v2 · 2014-08-01 · 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{IF7I7AMKSDWYVEONGVOTPOU7I4}

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	2026-05-18T02:16:51.236195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

417e8f818a90ed8a91cd355d37ba9f473b3780838d7a77ddc06d1774b95df5e3

Aliases

arxiv: 1408.0269 · arxiv_version: 1408.0269v2 · doi: 10.48550/arxiv.1408.0269 · pith_short_12: IF7I7AMKSDWY · pith_short_16: IF7I7AMKSDWYVEON · pith_short_8: IF7I7AMK

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/IF7I7AMKSDWYVEONGVOTPOU7I4 \
  | 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: 417e8f818a90ed8a91cd355d37ba9f473b3780838d7a77ddc06d1774b95df5e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b8b7ab9b1b2768ba68bc80f60cfaea54de3e12fe5990866833b9d47db6a63ae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-08-01T19:12:17Z",
    "title_canon_sha256": "c4ba47e57dcc85bf36de850dd84cb8ce413e74399814942e9c8c3d2a075420e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.0269",
    "kind": "arxiv",
    "version": 2
  }
}