Pith Number

pith:BYHQCLCW

pith:2017:BYHQCLCWBTAAP7CA6UJNKDT4SN

not attested not anchored not stored refs pending

Covering Groups of Nonconnected Topological Groups and 2-Groups

Demyan Vakhrameev, Dmitriy Rumynin, Matthew Westaway

arxiv:1709.09728 v4 · 2017-09-27 · math.QA · math.CT · 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{BYHQCLCWBTAAP7CA6UJNKDT4SN}

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	2026-05-17T23:50:28.785296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e0f012c560cc007fc40f512d50e7c935712fa65273cc162990d13f0569a7c55

Aliases

arxiv: 1709.09728 · arxiv_version: 1709.09728v4 · doi: 10.48550/arxiv.1709.09728 · pith_short_12: BYHQCLCWBTAA · pith_short_16: BYHQCLCWBTAAP7CA · pith_short_8: BYHQCLCW

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/BYHQCLCWBTAAP7CA6UJNKDT4SN \
  | 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: 0e0f012c560cc007fc40f512d50e7c935712fa65273cc162990d13f0569a7c55

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d1bac1ece82765abd283eef55f908fadbeab6aa5c51aadc30988d76703c2483",
    "cross_cats_sorted": [
      "math.CT",
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.QA",
    "submitted_at": "2017-09-27T20:34:32Z",
    "title_canon_sha256": "d631f2283c0816130e55ddf6af6d1d204520bb3b1463f0b3b2855afa3d91e652"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.09728",
    "kind": "arxiv",
    "version": 4
  }
}