Pith Number

pith:6NIXV6YQ

pith:2013:6NIXV6YQPNECCGZXKTZGW35Z5F

not attested not anchored not stored refs pending

Del Pezzo surfaces and local inequalities

Ivan Cheltsov

arxiv:1311.5260 v1 · 2013-11-20 · 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{6NIXV6YQPNECCGZXKTZGW35Z5F}

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	2026-05-18T03:06:33.850808Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3517afb107b48211b3754f26b6fb9e9680e569c773d77fe0266f8fff80da05f

Aliases

arxiv: 1311.5260 · arxiv_version: 1311.5260v1 · doi: 10.48550/arxiv.1311.5260 · pith_short_12: 6NIXV6YQPNEC · pith_short_16: 6NIXV6YQPNECCGZX · pith_short_8: 6NIXV6YQ

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/6NIXV6YQPNECCGZXKTZGW35Z5F \
  | 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: f3517afb107b48211b3754f26b6fb9e9680e569c773d77fe0266f8fff80da05f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66bd258c75585ff3fd2b78e3fd008ffc5bcb16e24b8ca68df1b32b6a621f22d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-11-20T23:03:05Z",
    "title_canon_sha256": "e9d9a4732451288832d6dcfd00ab6ab3556be34fe0ce03e9ffc1e3b34510ca19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.5260",
    "kind": "arxiv",
    "version": 1
  }
}