Pith Number

pith:3X6OU4VC

pith:2010:3X6OU4VCJWUE5JX4YR4DF2CJEI

not attested not anchored not stored refs pending

"McKay's E7 observation on the Baby Monster" and "McKay's E6 observation on the largest Fischer group"

Ching Hung Lam, Gerald Hoehn, Hiroshi Yamauchi

arxiv:1002.1777 v2 · 2010-02-09 · math.QA · math.GR

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

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	2026-05-18T04:15:04.642137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ddfcea72a24da84ea6fcc47832e849223988334846bf618cec0d6bafd4af9c32

Aliases

arxiv: 1002.1777 · arxiv_version: 1002.1777v2 · doi: 10.48550/arxiv.1002.1777 · pith_short_12: 3X6OU4VCJWUE · pith_short_16: 3X6OU4VCJWUE5JX4 · pith_short_8: 3X6OU4VC

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/3X6OU4VCJWUE5JX4YR4DF2CJEI \
  | 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: ddfcea72a24da84ea6fcc47832e849223988334846bf618cec0d6bafd4af9c32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36e8644c8296e1196a50218283499e33605733232732abacda2c967142d3771c",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.QA",
    "submitted_at": "2010-02-09T05:06:27Z",
    "title_canon_sha256": "0f16d7498960ef869e57c6fedd71f51739f050b7e835f7e2bbfd7fcb2589c548"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.1777",
    "kind": "arxiv",
    "version": 2
  }
}