Pith Number

pith:XFHU44WU

pith:2009:XFHU44WUQS5LGQN4SD43M2CSJT

not attested not anchored not stored refs pending

Characteristic classes of complex hypersurfaces

Joerg Schuermann, Julius L. Shaneson, Laurentiu Maxim, Sylvain E. Cappell

arxiv:0908.3240 v3 · 2009-08-22 · math.AT · 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{XFHU44WUQS5LGQN4SD43M2CSJT}

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	2026-05-18T03:58:51.924394Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b94f4e72d484bab341bc90f9b668524cfb702f79c903497769b1c77b858b1c2d

Aliases

arxiv: 0908.3240 · arxiv_version: 0908.3240v3 · doi: 10.48550/arxiv.0908.3240 · pith_short_12: XFHU44WUQS5L · pith_short_16: XFHU44WUQS5LGQN4 · pith_short_8: XFHU44WU

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/XFHU44WUQS5LGQN4SD43M2CSJT \
  | 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: b94f4e72d484bab341bc90f9b668524cfb702f79c903497769b1c77b858b1c2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e26634fa04f6735ebee1f47e9951c20fa44ad24c91667124de4826ee4fc1c8ac",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2009-08-22T09:59:40Z",
    "title_canon_sha256": "937843f538bebe9002638d3bd41ffc21305bb47e4124bfe3cdd936030c263f3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3240",
    "kind": "arxiv",
    "version": 3
  }
}