Pith Number

pith:FVEOCMDU

pith:2017:FVEOCMDUT4MXTZQKC35A5GWK2H

not attested not anchored not stored refs pending

Semi-extraspecial Groups

Mark L. Lewis

arxiv:1709.03857 v1 · 2017-09-12 · 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{FVEOCMDUT4MXTZQKC35A5GWK2H}

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	2026-05-18T00:35:29.206627Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d48e130749f1979e60a16fa0e9acad1d6036c51bced91518184ef77f9877b61

Aliases

arxiv: 1709.03857 · arxiv_version: 1709.03857v1 · doi: 10.48550/arxiv.1709.03857 · pith_short_12: FVEOCMDUT4MX · pith_short_16: FVEOCMDUT4MXTZQK · pith_short_8: FVEOCMDU

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/FVEOCMDUT4MXTZQKC35A5GWK2H \
  | 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: 2d48e130749f1979e60a16fa0e9acad1d6036c51bced91518184ef77f9877b61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29c7790a09160d6a0234f5c32fd2787261826c3ccdbde1d74cdc1144bf7a47e7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2017-09-12T14:21:53Z",
    "title_canon_sha256": "2b9e17111dbf62fe7694efaa1f1bb9892db78885333211afb6adce73e9f66b87"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.03857",
    "kind": "arxiv",
    "version": 1
  }
}