Pith Number

pith:HBGDUGFK

pith:2024:HBGDUGFKKWYOCYLJRXOLSRQUWN

not attested not anchored not stored refs pending

Efficient quaternion CUR method for low-rank approximation to quaternion matrix

Hongmin Cai, Kit Ian Kou, Peng-Ling Wu, Zhaoyuan Yu

arxiv:2402.19147 v1 · 2024-02-29 · 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{HBGDUGFKKWYOCYLJRXOLSRQUWN}

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	2026-07-05T07:50:41.655732Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

384c3a18aa55b0e161698ddcb94614b35110cec5cd3cce82bc6118872f74dc36

Aliases

arxiv: 2402.19147 · arxiv_version: 2402.19147v1 · doi: 10.48550/arxiv.2402.19147 · pith_short_12: HBGDUGFKKWYO · pith_short_16: HBGDUGFKKWYOCYLJ · pith_short_8: HBGDUGFK

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/HBGDUGFKKWYOCYLJRXOLSRQUWN \
  | 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: 384c3a18aa55b0e161698ddcb94614b35110cec5cd3cce82bc6118872f74dc36

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "781635ade13ba58b56b7f183ea18ec23d46a4c8a2bb00dafbc0e92fda2db4333",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2024-02-29T13:31:08Z",
    "title_canon_sha256": "16e21b3de354d4710bb194746345a652631b556fbf0203bd254b32d5fe3d3280"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2402.19147",
    "kind": "arxiv",
    "version": 1
  }
}