Pith Number

pith:2QXMA5H3

pith:2017:2QXMA5H3HA2JMWUGQP5DXUCVNN

not attested not anchored not stored refs pending

Motives of derived equivalent K3 surfaces

Daniel Huybrechts

arxiv:1702.03178 v1 · 2017-02-10 · 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{2QXMA5H3HA2JMWUGQP5DXUCVNN}

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	2026-05-18T00:50:58.531575Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d42ec074fb3834965a8683fa3bd0556b5cdbed131d733ec32950c04d19e9dc8f

Aliases

arxiv: 1702.03178 · arxiv_version: 1702.03178v1 · doi: 10.48550/arxiv.1702.03178 · pith_short_12: 2QXMA5H3HA2J · pith_short_16: 2QXMA5H3HA2JMWUG · pith_short_8: 2QXMA5H3

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/2QXMA5H3HA2JMWUGQP5DXUCVNN \
  | 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: d42ec074fb3834965a8683fa3bd0556b5cdbed131d733ec32950c04d19e9dc8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12a73b94272680cd3194b1b0aed00a9a0afc8acbeeea4c7230c8aefe87acbe6c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-02-10T14:18:11Z",
    "title_canon_sha256": "b45ad207ddbf70fc5b269b0bf20d50b87dc4c832c720999709843e447bde153c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.03178",
    "kind": "arxiv",
    "version": 1
  }
}