Pith Number

pith:YVTBAJ7P

pith:2019:YVTBAJ7PZTVSJ72EGNPUR375XD

not attested not anchored not stored refs pending

Non-Collapsible Dual Complexes and Fake del Pezzo Surfaces

Lev Soukhanov

arxiv:1906.10610 v3 · 2019-06-25 · 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{YVTBAJ7PZTVSJ72EGNPUR375XD}

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	2026-05-17T23:41:00.567696Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5661027efcceb24ff44335f48effdb8e0f3ed0486218efa98df3cce488507fb

Aliases

arxiv: 1906.10610 · arxiv_version: 1906.10610v3 · doi: 10.48550/arxiv.1906.10610 · pith_short_12: YVTBAJ7PZTVS · pith_short_16: YVTBAJ7PZTVSJ72E · pith_short_8: YVTBAJ7P

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/YVTBAJ7PZTVSJ72EGNPUR375XD \
  | 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: c5661027efcceb24ff44335f48effdb8e0f3ed0486218efa98df3cce488507fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d74180136cb571982141a561ca041e8bd1f7b3b0c3912668854fd14702243909",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-06-25T15:39:26Z",
    "title_canon_sha256": "55423c3c0d75bb705985802c5659a1a9aba91d9295d72b1b4fd050267c9faab4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.10610",
    "kind": "arxiv",
    "version": 3
  }
}