Pith Number

pith:6KIV4VAR

pith:2019:6KIV4VARM7VVC7YSICRNFADKZC

not attested not anchored not stored refs pending

A note on the singular value decomposition of (skew-)involutory and (skew-)coninvolutory matrices

Heike Fa{\ss}bender, Martin Halwa{\ss}

arxiv:1905.11106 v2 · 2019-05-27 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6KIV4VARM7VVC7YSICRNFADKZC}

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	2026-05-17T23:39:24.085128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2915e541167eb517f1240a2d2806ac886576eb709ec2ffe679aca88e51dfc93

Aliases

arxiv: 1905.11106 · arxiv_version: 1905.11106v2 · doi: 10.48550/arxiv.1905.11106 · pith_short_12: 6KIV4VARM7VV · pith_short_16: 6KIV4VARM7VVC7YS · pith_short_8: 6KIV4VAR

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/6KIV4VARM7VVC7YSICRNFADKZC \
  | 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: f2915e541167eb517f1240a2d2806ac886576eb709ec2ffe679aca88e51dfc93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a67f185967dae7f127988b887615865fe793fd28df1ce45a29e61c93a4c4bc4",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-05-27T10:27:09Z",
    "title_canon_sha256": "658ff9646f9c347ee6a3f33ef8c5cde550667f1600184c228ad52da4a9467895"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.11106",
    "kind": "arxiv",
    "version": 2
  }
}