Pith Number

pith:WSAV6V3Q

pith:2022:WSAV6V3QFWRBSYCAMINBDZ4KZ3

not attested not anchored not stored refs pending

The cotangent bundle of K3 surfaces of degree two

Andreas H\"oring, Fabrizio Anella

arxiv:2207.09294 v2 · 2022-07-19 · 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{WSAV6V3QFWRBSYCAMINBDZ4KZ3}

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	2026-05-20T14:03:15.852967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4815f57702da2196040621a11e78aced10512ba105a4b975c3385810a2769ce

Aliases

arxiv: 2207.09294 · arxiv_version: 2207.09294v2 · doi: 10.48550/arxiv.2207.09294 · pith_short_12: WSAV6V3QFWRB · pith_short_16: WSAV6V3QFWRBSYCA · pith_short_8: WSAV6V3Q

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/WSAV6V3QFWRBSYCAMINBDZ4KZ3 \
  | 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: b4815f57702da2196040621a11e78aced10512ba105a4b975c3385810a2769ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ca60d9332b12b6466644e5debb78730c183205a2e8efb71e0d633b8790c6bb3",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2022-07-19T14:25:34Z",
    "title_canon_sha256": "7ccda35f15614c35ba4a61dd274f6705fbde4fad3340875cabf21c3f0f955d62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2207.09294",
    "kind": "arxiv",
    "version": 2
  }
}