Pith Number

pith:P56F7IT7

pith:2018:P56F7IT7K6MDPAVWUNPWLFN2YQ

not attested not anchored not stored refs pending

A Structure-Preserving One-Sided Jacobi Method for Computing the SVD of a Quaternion Matrix

Ru-Ru Ma, Zheng-Jian Bai

arxiv:1811.08671 v1 · 2018-11-21 · math.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{P56F7IT7K6MDPAVWUNPWLFN2YQ}

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	2026-05-18T00:00:11.939990Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f7c5fa27f57983782b6a35f6595bac4129f1a99ecc55cb82f1620af5057dbf0

Aliases

arxiv: 1811.08671 · arxiv_version: 1811.08671v1 · doi: 10.48550/arxiv.1811.08671 · pith_short_12: P56F7IT7K6MD · pith_short_16: P56F7IT7K6MDPAVW · pith_short_8: P56F7IT7

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/P56F7IT7K6MDPAVWUNPWLFN2YQ \
  | 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: 7f7c5fa27f57983782b6a35f6595bac4129f1a99ecc55cb82f1620af5057dbf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff0ff63c59d6e68330791286e9c0763cd75f8c64cae48bd0c990da76a1c0e798",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-11-21T10:39:25Z",
    "title_canon_sha256": "fffb70dad00df87c524e1bbcbed0de2fd7ede64d82ced2541986910de0f2a02f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.08671",
    "kind": "arxiv",
    "version": 1
  }
}