Pith Number

pith:A6EPEEZ5

pith:2011:A6EPEEZ5QWCUUZNURZJH63WWDR

not attested not anchored not stored refs pending

Derived categories of coherent sheaves and motives of K3 surfaces

Alessio del Padrone, Claudio Pedrini

arxiv:1105.4568 v1 · 2011-05-23 · math.AG · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A6EPEEZ5QWCUUZNURZJH63WWDR}

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	2026-05-18T04:21:23.148296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0788f2133d85854a65b48e527f6ed61c63a0781f7ddf3f9e9ec60a96165ba3d9

Aliases

arxiv: 1105.4568 · arxiv_version: 1105.4568v1 · doi: 10.48550/arxiv.1105.4568 · pith_short_12: A6EPEEZ5QWCU · pith_short_16: A6EPEEZ5QWCUUZNU · pith_short_8: A6EPEEZ5

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/A6EPEEZ5QWCUUZNURZJH63WWDR \
  | 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: 0788f2133d85854a65b48e527f6ed61c63a0781f7ddf3f9e9ec60a96165ba3d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8fa2bf89ad91c211b7cb2e047bde56f68eac86ff96e19e515c4d9cebc24a0040",
    "cross_cats_sorted": [
      "math.KT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2011-05-23T17:22:43Z",
    "title_canon_sha256": "c228c3e90fd60b6d79008aa3cf626cea754c1923e3dfa6d918182bca1cf70f78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4568",
    "kind": "arxiv",
    "version": 1
  }
}