Pith Number

pith:YOX46KIU

pith:2012:YOX46KIUFEM5QX3NSFVLAYRQ2L

not attested not anchored not stored refs pending

Searching for partial Hadamard matrices

Amparo Osuna, Elena Mart\'in, F\'elix Gudiel, Jos\'e-Andr\'es Armario, Mar\'ia-Bel\'en G\"uemes, Mar\'ia-Dolores Frau, V\'ictor \'Alvarez

arxiv:1201.4021 v1 · 2012-01-19 · 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{YOX46KIUFEM5QX3NSFVLAYRQ2L}

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	2026-05-18T04:04:16.144826Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3afcf29142919d85f6d916ab06230d2fff65accac9a5665c554e9afd296c50b

Aliases

arxiv: 1201.4021 · arxiv_version: 1201.4021v1 · doi: 10.48550/arxiv.1201.4021 · pith_short_12: YOX46KIUFEM5 · pith_short_16: YOX46KIUFEM5QX3N · pith_short_8: YOX46KIU

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/YOX46KIUFEM5QX3NSFVLAYRQ2L \
  | 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: c3afcf29142919d85f6d916ab06230d2fff65accac9a5665c554e9afd296c50b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8525f8c16fb91b2803cd3947f43d48312dc3f6ccd5ad984b6bf4476dd876ff96",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-01-19T11:04:18Z",
    "title_canon_sha256": "0adb01e64b6f3ed208c6b1c7c229111b3105d1989095c9d33607191668e99209"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4021",
    "kind": "arxiv",
    "version": 1
  }
}