Pith Number

pith:7CJASXLE

pith:2010:7CJASXLEHTQEBMRNQYCAUG5FSG

not attested not anchored not stored refs pending

On the second cohomology of K\"ahler groups

Bruno Klingler (IMJ, IAS), Julien Maubon (IECN), Vincent Koziarz (IECN)

arxiv:1004.3130 v2 · 2010-04-19 · math.DG · math.AG · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7CJASXLEHTQEBMRNQYCAUG5FSG}

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	2026-05-18T04:33:49.739178Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f892095d643ce040b22d86040a1ba59196f3c73138cd07a96307426dd12368ea

Aliases

arxiv: 1004.3130 · arxiv_version: 1004.3130v2 · doi: 10.48550/arxiv.1004.3130 · pith_short_12: 7CJASXLEHTQE · pith_short_16: 7CJASXLEHTQEBMRN · pith_short_8: 7CJASXLE

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/7CJASXLEHTQEBMRNQYCAUG5FSG \
  | 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: f892095d643ce040b22d86040a1ba59196f3c73138cd07a96307426dd12368ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5bdc0520775c7ab151d70e58935b541c0a92468fd2eb93b5f234fa6daa6ec370",
    "cross_cats_sorted": [
      "math.AG",
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2010-04-19T09:13:27Z",
    "title_canon_sha256": "9f80f80b0ff5a7fb4ef639bd7ed32b3cfa11c0630de4997eafbf1c7472655d63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.3130",
    "kind": "arxiv",
    "version": 2
  }
}