Pith Number

pith:CNTXCSR5

pith:2019:CNTXCSR5YNWGXRNRT55KQV644I

not attested not anchored not stored refs pending

Quotients of del Pezzo surfaces

Andrey Trepalin

arxiv:1906.04030 v1 · 2019-06-07 · 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{CNTXCSR5YNWGXRNRT55KQV644I}

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	2026-05-17T23:43:44.125851Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1367714a3dc36c6bc5b19f7aa857dce220d78b5e50a7126dfc342abb4c49b2b3

Aliases

arxiv: 1906.04030 · arxiv_version: 1906.04030v1 · doi: 10.48550/arxiv.1906.04030 · pith_short_12: CNTXCSR5YNWG · pith_short_16: CNTXCSR5YNWGXRNR · pith_short_8: CNTXCSR5

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/CNTXCSR5YNWGXRNRT55KQV644I \
  | 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: 1367714a3dc36c6bc5b19f7aa857dce220d78b5e50a7126dfc342abb4c49b2b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e438e9e3f18d905757e7c3e7a80d51f06e3d12b55b175d19397ed65943647c90",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-06-07T11:59:15Z",
    "title_canon_sha256": "e2b7e907ea4cca874c9292a4370591d230b66ed5d0d1da9a1af4e45618fcdc95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.04030",
    "kind": "arxiv",
    "version": 1
  }
}