Pith Number

pith:JMYOPFVH

pith:2010:JMYOPFVHYD4JDCKD7BT5KY4CE2

not attested not anchored not stored refs pending

Poisson Cohomology of Del Pezzo surfaces

Ping Xu, Wei Hong

arxiv:1001.1082 v2 · 2010-01-07 · math-ph · hep-th · math.DG · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JMYOPFVHYD4JDCKD7BT5KY4CE2}

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	2026-05-18T04:29:53.921363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b30e796a7c0f8918943f867d5638226baa9f2295b12834db294989709a5b588

Aliases

arxiv: 1001.1082 · arxiv_version: 1001.1082v2 · doi: 10.48550/arxiv.1001.1082 · pith_short_12: JMYOPFVHYD4J · pith_short_16: JMYOPFVHYD4JDCKD · pith_short_8: JMYOPFVH

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/JMYOPFVHYD4JDCKD7BT5KY4CE2 \
  | 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: 4b30e796a7c0f8918943f867d5638226baa9f2295b12834db294989709a5b588

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15c3676cc0115583165b2cf6194dc55b3d59ca93823b849f7b0e38d17ffdcd47",
    "cross_cats_sorted": [
      "hep-th",
      "math.DG",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2010-01-07T14:58:01Z",
    "title_canon_sha256": "80a0bb299d3d7ba7bea201c92b52ac52105d938f96765cf41c9e8ec122542774"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.1082",
    "kind": "arxiv",
    "version": 2
  }
}