Pith Number

pith:K4HL2E2Q

pith:2017:K4HL2E2QBBFOI6WDP5VE76GDLW

not attested not anchored not stored refs pending

Classification of Picard lattices of K3 surfaces

Viacheslav V. Nikulin

arxiv:1707.05677 v2 · 2017-07-16 · 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{K4HL2E2QBBFOI6WDP5VE76GDLW}

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	2026-05-17T23:57:48.885460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

570ebd1350084ae47ac37f6a4ff8c35da16bb8e819ba5ebb2881f0ce55a3b652

Aliases

arxiv: 1707.05677 · arxiv_version: 1707.05677v2 · doi: 10.48550/arxiv.1707.05677 · pith_short_12: K4HL2E2QBBFO · pith_short_16: K4HL2E2QBBFOI6WD · pith_short_8: K4HL2E2Q

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/K4HL2E2QBBFOI6WDP5VE76GDLW \
  | 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: 570ebd1350084ae47ac37f6a4ff8c35da16bb8e819ba5ebb2881f0ce55a3b652

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11646af9c1bc3f21c629913bf1f5149e4684e42c832bbeca0f1e20627542fc51",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-07-16T18:53:48Z",
    "title_canon_sha256": "001d684618e1c1c4387d4362ecb0824fa7b318b6e67564d35443eeaea6438ff0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.05677",
    "kind": "arxiv",
    "version": 2
  }
}