Pith Number

pith:EIV22FI5

pith:2009:EIV22FI5QTA5TRYLH3L77N6TC3

not attested not anchored not stored refs pending

Sparse representation of solutions of Kronecker product systems

Sadegh Jokar, Volker Mehrmann

arxiv:0902.4587 v1 · 2009-02-26 · math.NA · cs.NA · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EIV22FI5QTA5TRYLH3L77N6TC3}

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	2026-06-03T23:06:11.363111Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

222bad151d84c1d9c70b3ed7ffb7d316d2ffeef3dfbf1865eead7da2782acc1b

Aliases

arxiv: 0902.4587 · arxiv_version: 0902.4587v1 · doi: 10.48550/arxiv.0902.4587 · pith_short_12: EIV22FI5QTA5 · pith_short_16: EIV22FI5QTA5TRYL · pith_short_8: EIV22FI5

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/EIV22FI5QTA5TRYLH3L77N6TC3 \
  | 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: 222bad151d84c1d9c70b3ed7ffb7d316d2ffeef3dfbf1865eead7da2782acc1b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f41ee343b08b652d0c622729ebab55ca4b7ebb065876593572deaeb11b04e961",
    "cross_cats_sorted": [
      "cs.NA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-02-26T14:45:33Z",
    "title_canon_sha256": "d6b6389abadb4a873b75493d7b6a545822abd5b83b68cab27e8e31cc48466238"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4587",
    "kind": "arxiv",
    "version": 1
  }
}