Pith Number

pith:N6CIFFYZ

pith:2009:N6CIFFYZWVVO33MWDVTCK4PN2B

not attested not anchored not stored refs pending

On zero-dimensionality and the connected component of locally pseudocompact groups

Dikran Dikranjan, G\'abor Luk\'acs

arxiv:0909.1390 v3 · 2009-09-08 · math.GN · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N6CIFFYZWVVO33MWDVTCK4PN2B}

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	2026-05-18T04:12:21.357128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f84829719b56aeded961d662571edd077e4c424712fb10e7cf0d591f9e7d9b9

Aliases

arxiv: 0909.1390 · arxiv_version: 0909.1390v3 · doi: 10.48550/arxiv.0909.1390 · pith_short_12: N6CIFFYZWVVO · pith_short_16: N6CIFFYZWVVO33MW · pith_short_8: N6CIFFYZ

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/N6CIFFYZWVVO33MWDVTCK4PN2B \
  | 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: 6f84829719b56aeded961d662571edd077e4c424712fb10e7cf0d591f9e7d9b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4eccafac02256339de50b280c6be5d7bb1e6b2babbbf51d75afd240546e9eadd",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2009-09-08T05:26:55Z",
    "title_canon_sha256": "9e74082bc21d8aca4c18d9c42ed00eb0d6d6db641179e0d041f78f7d2a31ad27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1390",
    "kind": "arxiv",
    "version": 3
  }
}