Pith Number

pith:UEHK4J5G

pith:2011:UEHK4J5GXXQLL2N22O7DM3ADY7

not attested not anchored not stored refs pending

An improved method for the computation of the Moore-Penrose inverse matrix

Athanassios Petralias, Dimitrios Pappas, Vasilios N. Katsikis

arxiv:1102.1845 v1 · 2011-02-09 · 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{UEHK4J5GXXQLL2N22O7DM3ADY7}

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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	2026-05-18T04:29:44.087990Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a10eae27a6bde0b5e9bad3be366c03c7d8e3e5e6933bf89d8645842e2ad3fe09

Aliases

arxiv: 1102.1845 · arxiv_version: 1102.1845v1 · doi: 10.48550/arxiv.1102.1845 · pith_short_12: UEHK4J5GXXQL · pith_short_16: UEHK4J5GXXQLL2N2 · pith_short_8: UEHK4J5G

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/UEHK4J5GXXQLL2N22O7DM3ADY7 \
  | 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: a10eae27a6bde0b5e9bad3be366c03c7d8e3e5e6933bf89d8645842e2ad3fe09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80a392311f6aa33227b54f7e4415079d27489f8740ba7d63a91b0802061001f7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-02-09T11:50:19Z",
    "title_canon_sha256": "d35eeaffa909570e0393737d8f67c88fc1bc71ec6824b3425335aaa70e585325"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.1845",
    "kind": "arxiv",
    "version": 1
  }
}