Pith Number

pith:WDFZCMIY

pith:2013:WDFZCMIYFYLHKLA3JMO2KLIWIB

not attested not anchored not stored refs pending

On derived categories of K3 surfaces, symplectic automorphisms and the Conway group

Daniel Huybrechts

arxiv:1309.6528 v4 · 2013-09-25 · 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{WDFZCMIYFYLHKLA3JMO2KLIWIB}

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	2026-05-18T02:43:16.476433Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0cb9131182e16752c1b4b1da52d1640489132ede7c8fe5d7eaef0ebd3d53d2d

Aliases

arxiv: 1309.6528 · arxiv_version: 1309.6528v4 · doi: 10.48550/arxiv.1309.6528 · pith_short_12: WDFZCMIYFYLH · pith_short_16: WDFZCMIYFYLHKLA3 · pith_short_8: WDFZCMIY

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/WDFZCMIYFYLHKLA3JMO2KLIWIB \
  | 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: b0cb9131182e16752c1b4b1da52d1640489132ede7c8fe5d7eaef0ebd3d53d2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a284d8a592f187e99db7739f4c5974375d9dff766fb7984a9a16350b2e046090",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-09-25T14:44:41Z",
    "title_canon_sha256": "aa14772d5386f4eda9c549e156480e0121717fe95020140f21f34259161856a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.6528",
    "kind": "arxiv",
    "version": 4
  }
}