Pith Number

pith:HD4DAJYU

pith:2018:HD4DAJYUVKHPSPJQJSQYGBKOCM

not attested not anchored not stored refs pending

Skew braces and the Galois correspondence for Hopf Galois structures

Lindsay N. Childs

arxiv:1802.03448 v2 · 2018-02-09 · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HD4DAJYUVKHPSPJQJSQYGBKOCM}

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	2026-05-17T23:40:20.857689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

38f8302714aa8ef93d304ca183054e13067e1f5cd466d03e3f9d0a336b96df01

Aliases

arxiv: 1802.03448 · arxiv_version: 1802.03448v2 · doi: 10.48550/arxiv.1802.03448 · pith_short_12: HD4DAJYUVKHP · pith_short_16: HD4DAJYUVKHPSPJQ · pith_short_8: HD4DAJYU

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/HD4DAJYUVKHPSPJQJSQYGBKOCM \
  | 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: 38f8302714aa8ef93d304ca183054e13067e1f5cd466d03e3f9d0a336b96df01

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a70428d606d18a2f536f693252320b450f5f14c193db3a7e26bc6bcf3a62495",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2018-02-09T21:11:13Z",
    "title_canon_sha256": "881a36dd7641ac426d48e8093cab44a2b25063b1d5028959a84cb96a5a041e70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03448",
    "kind": "arxiv",
    "version": 2
  }
}