Pith Number

pith:MQTSLGYD

pith:2019:MQTSLGYD3CVZD3VLALQ2NYTT2W

not attested not anchored not stored refs pending

Constructing cocyclic Hadamard matrices of order 4p

Heiko Dietrich, Padraig O Cathain, Santiago Barrera Acevedo

arxiv:1904.11460 v2 · 2019-04-25 · math.CO · 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{MQTSLGYD3CVZD3VLALQ2NYTT2W}

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	2026-05-17T23:40:23.361191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6427259b03d8ab91eeab02e1a6e273d5b7a5f90dd95186aa6c903db0c7356d42

Aliases

arxiv: 1904.11460 · arxiv_version: 1904.11460v2 · doi: 10.48550/arxiv.1904.11460 · pith_short_12: MQTSLGYD3CVZ · pith_short_16: MQTSLGYD3CVZD3VL · pith_short_8: MQTSLGYD

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/MQTSLGYD3CVZD3VLALQ2NYTT2W \
  | 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: 6427259b03d8ab91eeab02e1a6e273d5b7a5f90dd95186aa6c903db0c7356d42

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cdf7cb83640e7a737cefeddfd1e952de959080e64937992427ca99f0f1abdcc1",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-04-25T17:02:54Z",
    "title_canon_sha256": "e2870a5de7e1da20039889374deaac28f4602b733a191b44391fb6a0cedc440b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.11460",
    "kind": "arxiv",
    "version": 2
  }
}