Pith Number

pith:U2WTFBII

pith:2019:U2WTFBIISPYOEIMTOXJPG5FO73

not attested not anchored not stored refs pending

Bi-skew braces and Hopf Galois structures

Lindsay N. Childs

arxiv:1904.08814 v1 · 2019-04-18 · 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{U2WTFBIISPYOEIMTOXJPG5FO73}

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	2026-05-17T23:40:17.250701Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6ad32850893f0e2219375d2f374aefef63e3ea97f5bbd42358fc0d06a03b8cb

Aliases

arxiv: 1904.08814 · arxiv_version: 1904.08814v1 · doi: 10.48550/arxiv.1904.08814 · pith_short_12: U2WTFBIISPYO · pith_short_16: U2WTFBIISPYOEIMT · pith_short_8: U2WTFBII

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/U2WTFBIISPYOEIMTOXJPG5FO73 \
  | 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: a6ad32850893f0e2219375d2f374aefef63e3ea97f5bbd42358fc0d06a03b8cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "49370c163ecdfc2e886e43a6176e588f7430fabff9fcff318df53e8977252d06",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2019-04-18T14:39:41Z",
    "title_canon_sha256": "a520feb3bfd98461f8d7d7dea31702036e137fdeb7df44b68e915bbb8edfd72a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08814",
    "kind": "arxiv",
    "version": 1
  }
}