Pith Number

pith:MHVFWRMU

pith:2008:MHVFWRMU4HKMNSYF2GHMX7W2EC

not attested not anchored not stored refs pending

Poincare duality complexes in dimension four

Beatrice Bleile, Hans Joachim Baues

arxiv:0802.3652 v2 · 2008-02-25 · 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{MHVFWRMU4HKMNSYF2GHMX7W2EC}

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	2026-05-18T02:41:51.750754Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

61ea5b4594e1d4c6cb05d18ecbfeda208179913044ce916c05de21cfb1143ef3

Aliases

arxiv: 0802.3652 · arxiv_version: 0802.3652v2 · doi: 10.48550/arxiv.0802.3652 · pith_short_12: MHVFWRMU4HKM · pith_short_16: MHVFWRMU4HKMNSYF · pith_short_8: MHVFWRMU

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/MHVFWRMU4HKMNSYF2GHMX7W2EC \
  | 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: 61ea5b4594e1d4c6cb05d18ecbfeda208179913044ce916c05de21cfb1143ef3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89c91f2286e10216f2accdc23f0ddc95dd0374bb0229a1d00071ddeb2e1319c3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2008-02-25T17:05:53Z",
    "title_canon_sha256": "744f6cf2f3ab1abb116c219bd6a3ba1e8f3b86a6fce1b41675d1795134225773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.3652",
    "kind": "arxiv",
    "version": 2
  }
}