Pith Number

pith:K47BK43G

pith:2009:K47BK43GL3GGSTEYIPWF2QBGOV

not attested not anchored not stored refs pending

smt: a Matlab structured matrices toolbox

Giuseppe Rodriguez, Michela Redivo-Zaglia

arxiv:0903.5094 v1 · 2009-03-30 · 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{K47BK43GL3GGSTEYIPWF2QBGOV}

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	2026-06-03T23:06:25.328755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

573e1573665ecc694c9843ec5d4026755c933c13fa68813720663d480bbd4e07

Aliases

arxiv: 0903.5094 · arxiv_version: 0903.5094v1 · doi: 10.48550/arxiv.0903.5094 · pith_short_12: K47BK43GL3GG · pith_short_16: K47BK43GL3GGSTEY · pith_short_8: K47BK43G

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/K47BK43GL3GGSTEYIPWF2QBGOV \
  | 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: 573e1573665ecc694c9843ec5d4026755c933c13fa68813720663d480bbd4e07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09781baac6d8797cd9ad1aa0d9b50ab2d7e00b785de9dc1a5e6fbb2132112096",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-03-30T15:21:53Z",
    "title_canon_sha256": "8951c6a8ffddbd7db53ffc5d71bef981755e1a076ba1f9aa0a3007e53fc1d585"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.5094",
    "kind": "arxiv",
    "version": 1
  }
}