Pith Number

pith:PVVK4YSZ

pith:2017:PVVK4YSZJLVQCB3JBVBGRB5JTN

not attested not anchored not stored refs pending

On the homeomophism type of smooth projective fourfolds

Keiji Oguiso, Thomas Peternell

arxiv:1707.05657 v3 · 2017-07-18 · 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{PVVK4YSZJLVQCB3JBVBGRB5JTN}

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	2026-05-18T00:03:37.300908Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d6aae62594aeb0107690d426887a99b5f23f875dcb5221a4686961ce64437f4

Aliases

arxiv: 1707.05657 · arxiv_version: 1707.05657v3 · doi: 10.48550/arxiv.1707.05657 · pith_short_12: PVVK4YSZJLVQ · pith_short_16: PVVK4YSZJLVQCB3J · pith_short_8: PVVK4YSZ

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/PVVK4YSZJLVQCB3JBVBGRB5JTN \
  | 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: 7d6aae62594aeb0107690d426887a99b5f23f875dcb5221a4686961ce64437f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df0f62e39e967fd7528adf985c1710b1a8fa7a67c71d6918cbeeced061bd5bf3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-07-18T14:55:04Z",
    "title_canon_sha256": "8090040c0986cac16f0432b90b3357c1ce76544ad3e811ba7f6250603530c81d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.05657",
    "kind": "arxiv",
    "version": 3
  }
}