Pith Number

pith:MGFQGTFC

pith:2022:MGFQGTFCFNHPL2FSOM327S3O7J

not attested not anchored not stored refs pending

Compactifications of moduli spaces of K3 surfaces with a nonsymplectic involution

Philip Engel, Valery Alexeev

arxiv:2208.10383 v2 · 2022-08-22 · math.AG · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MGFQGTFCFNHPL2FSOM327S3O7J}

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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.

Cited by

1 paper in Pith

Normal stable degenerations of Noether-Horikawa surfaces

Receipt and verification

First computed	2026-07-05T06:09:31.499828Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

618b034ca22b4ef5e8b27337afcb6efa56412adbc109befd8d55243167804a07

Aliases

arxiv: 2208.10383 · arxiv_version: 2208.10383v2 · doi: 10.48550/arxiv.2208.10383 · pith_short_12: MGFQGTFCFNHP · pith_short_16: MGFQGTFCFNHPL2FS · pith_short_8: MGFQGTFC

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/MGFQGTFCFNHPL2FSOM327S3O7J \
  | 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: 618b034ca22b4ef5e8b27337afcb6efa56412adbc109befd8d55243167804a07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff805d5b5928d6fefc2f1aacaa59e536cdbcc57a1612b219e91e6e76f38f6472",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2022-08-22T15:03:10Z",
    "title_canon_sha256": "c104e9df76db2ea66f47f3b094ef52e8d4fcfebcad3bca3b693e1598bc5132d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2208.10383",
    "kind": "arxiv",
    "version": 2
  }
}