Pith Number

pith:KDUOU5TI

pith:2019:KDUOU5TIQX7WQDCP366SWZXWDB

not attested not anchored not stored refs pending

Geometrical inverse matrix approximation for least-squares problems and acceleration strategies

Jean-Paul Chehab, Marcos Raydan

arxiv:1902.08388 v1 · 2019-02-22 · 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{KDUOU5TIQX7WQDCP366SWZXWDB}

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	2026-05-17T23:52:57.407976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50e8ea766885ff680c4fdfbd2b66f6187ddc411586aad1bbc30688d4a9df58e7

Aliases

arxiv: 1902.08388 · arxiv_version: 1902.08388v1 · doi: 10.48550/arxiv.1902.08388 · pith_short_12: KDUOU5TIQX7W · pith_short_16: KDUOU5TIQX7WQDCP · pith_short_8: KDUOU5TI

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/KDUOU5TIQX7WQDCP366SWZXWDB \
  | 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: 50e8ea766885ff680c4fdfbd2b66f6187ddc411586aad1bbc30688d4a9df58e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d58060af962839d344f42fbf1e46ba6e9c29c323996f516a68deaab783ae547f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-02-22T08:06:20Z",
    "title_canon_sha256": "0bfbb00378b9333001f7cbbe96127d82b91c4e09fdd1fa514cada075b3e17ba1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.08388",
    "kind": "arxiv",
    "version": 1
  }
}