Pith Number

pith:NC7S2T7S

pith:2012:NC7S2T7SREXA6HXWUFRUVHV2T2

not attested not anchored not stored refs pending

A sign pattern that allows oppositely signed orthogonal matrices

Bryan L. Shader, Chanyoung L. Shader

arxiv:1212.6062 v1 · 2012-12-25 · 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{NC7S2T7SREXA6HXWUFRUVHV2T2}

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	2026-05-18T03:37:42.903086Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68bf2d4ff2892e0f1ef6a1634a9eba9e8a8b0bea01d2f0e082a515e5d9cb898d

Aliases

arxiv: 1212.6062 · arxiv_version: 1212.6062v1 · doi: 10.48550/arxiv.1212.6062 · pith_short_12: NC7S2T7SREXA · pith_short_16: NC7S2T7SREXA6HXW · pith_short_8: NC7S2T7S

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/NC7S2T7SREXA6HXWUFRUVHV2T2 \
  | 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: 68bf2d4ff2892e0f1ef6a1634a9eba9e8a8b0bea01d2f0e082a515e5d9cb898d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d568865a79128a77816b10e693f0dacc53312d89dc6f8eb356bb0d63bd1d6da",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-12-25T14:51:02Z",
    "title_canon_sha256": "60e583721f85fd34dc530c4b6ac8028f39c77c3576e36220bd3767baa570803a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.6062",
    "kind": "arxiv",
    "version": 1
  }
}