Pith Number

pith:CMEVI525

pith:2006:CMEVI525N43VZTJSQ4WYJDAOCE

not attested not anchored not stored refs pending

String homology of spheres and projective spaces

Craig Westerland

arxiv:math/0602539 v1 · 2006-02-23 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CMEVI525N43VZTJSQ4WYJDAOCE}

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	2026-05-18T02:41:31.907150Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

130954775d6f375ccd32872d848c0e113b3a2e94d8705f4787e5bac8c1124faa

Aliases

arxiv: math/0602539 · arxiv_version: math/0602539v1 · doi: 10.48550/arxiv.math/0602539 · pith_short_12: CMEVI525N43V · pith_short_16: CMEVI525N43VZTJS · pith_short_8: CMEVI525

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/CMEVI525N43VZTJSQ4WYJDAOCE \
  | 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: 130954775d6f375ccd32872d848c0e113b3a2e94d8705f4787e5bac8c1124faa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c367370a17c421feb2a46a3b56d917ceb985952b62a154ce35cec982f0c0d412",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "2006-02-23T22:29:30Z",
    "title_canon_sha256": "2669d949d09cfe753e3297666d1adff956847f9bd125637fd5d71f73a4e1df28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0602539",
    "kind": "arxiv",
    "version": 1
  }
}