Pith Number

pith:OXVIXQQS

pith:2002:OXVIXQQSYGARZ6BSN4A7QHEOC4

not attested not anchored not stored refs pending

Cell-like resolutions preserving cohomological dimensions

Michael Levin

arxiv:math/0208148 v2 · 2002-08-21 · math.GN · 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{OXVIXQQSYGARZ6BSN4A7QHEOC4}

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	2026-05-18T02:41:32.913861Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75ea8bc212c1811cf8326f01f81c8e17291cf91b22dd0a087bf8abee89389f77

Aliases

arxiv: math/0208148 · arxiv_version: math/0208148v2 · doi: 10.48550/arxiv.math/0208148 · pith_short_12: OXVIXQQSYGAR · pith_short_16: OXVIXQQSYGARZ6BS · pith_short_8: OXVIXQQS

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/OXVIXQQSYGARZ6BSN4A7QHEOC4 \
  | 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: 75ea8bc212c1811cf8326f01f81c8e17291cf91b22dd0a087bf8abee89389f77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87cc653a1ad9b795d48f957c8b26abd7d751ad84b33d281d91a34e130c8a4c09",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "",
    "primary_cat": "math.GN",
    "submitted_at": "2002-08-21T10:14:26Z",
    "title_canon_sha256": "79654a14b65f12e693f589672c9e1205931214aab72b326f86fb28216f1c6bd2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0208148",
    "kind": "arxiv",
    "version": 2
  }
}