Pith Number

pith:NPYKHRK2

pith:2025:NPYKHRK2JLOVIFBLJ6FQXJCBFE

not attested not anchored not stored refs pending

Construction of Butson matrices using Fourier matrices as input

Farouk Adda

arxiv:2504.15980 v1 · 2025-04-22 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NPYKHRK2JLOVIFBLJ6FQXJCBFE}

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	2026-07-05T10:52:33.075916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bf0a3c55a4add54142b4f8b0ba44129299ce212a55b7f55c84f512ef6623815

Aliases

arxiv: 2504.15980 · arxiv_version: 2504.15980v1 · doi: 10.48550/arxiv.2504.15980 · pith_short_12: NPYKHRK2JLOV · pith_short_16: NPYKHRK2JLOVIFBL · pith_short_8: NPYKHRK2

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/NPYKHRK2JLOVIFBLJ6FQXJCBFE \
  | 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: 6bf0a3c55a4add54142b4f8b0ba44129299ce212a55b7f55c84f512ef6623815

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ce5373d906d42b3481ffc1367885cbff05b70e11a04854cf8ac554b86baba01",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2025-04-22T15:32:05Z",
    "title_canon_sha256": "05824a0f05f6b045e72e90a64e252daebf2abe7d68f1bc8c45daa074682d7d06"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.15980",
    "kind": "arxiv",
    "version": 1
  }
}