Pith Number

pith:O2UV3KJI

pith:2013:O2UV3KJICAQERNC7EKZDBJL24H

not attested not anchored not stored refs pending

Infinite CW-complexes, Brauer groups and phantom cohomology

Jens Hornbostel, Stefan Schroeer

arxiv:1304.3986 v3 · 2013-04-15 · 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{O2UV3KJICAQERNC7EKZDBJL24H}

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	2026-05-18T03:13:45.920710Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76a95da928102048b45f22b230a57ae1c064f8e2a047c082542e40a6246a7423

Aliases

arxiv: 1304.3986 · arxiv_version: 1304.3986v3 · doi: 10.48550/arxiv.1304.3986 · pith_short_12: O2UV3KJICAQE · pith_short_16: O2UV3KJICAQERNC7 · pith_short_8: O2UV3KJI

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/O2UV3KJICAQERNC7EKZDBJL24H \
  | 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: 76a95da928102048b45f22b230a57ae1c064f8e2a047c082542e40a6246a7423

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "595f7ab408a259994aa8407560ae2a8976399a4c24655f627de9c5fb66cc859a",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-04-15T05:30:31Z",
    "title_canon_sha256": "27f78fcaaa4134d3008e8a4d974d5579b4b906f2ccc897e3e3f7a5c714c06650"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.3986",
    "kind": "arxiv",
    "version": 3
  }
}