Pith Number

pith:4AEJGONZ

pith:2008:4AEJGONZ262R66D7Q6OWKYYGZN

not attested not anchored not stored refs pending

Rapid factorization of structured matrices via randomized sampling

Per-Gunnar Martinsson

arxiv:0806.2339 v1 · 2008-06-13 · 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{4AEJGONZ262R66D7Q6OWKYYGZN}

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.

Cited by

1 paper in Pith

Quasi-optimal hierarchically semi-separable matrix approximation

Receipt and verification

First computed	2026-06-03T22:06:06.902355Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0089339b9d7b51f787f879d656306cb732696a1728959480c515ec4ea957ecc

Aliases

arxiv: 0806.2339 · arxiv_version: 0806.2339v1 · doi: 10.48550/arxiv.0806.2339 · pith_short_12: 4AEJGONZ262R · pith_short_16: 4AEJGONZ262R66D7 · pith_short_8: 4AEJGONZ

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/4AEJGONZ262R66D7Q6OWKYYGZN \
  | 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: e0089339b9d7b51f787f879d656306cb732696a1728959480c515ec4ea957ecc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f29103b2cb7200e3b886aede42ad2fdd68a2a6679d70f2bf768f30f89e8797dc",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2008-06-13T22:00:04Z",
    "title_canon_sha256": "0f1137fc62ca780c4a4aba41c88f031bf4dc8b49624fad11bba4e6af45de0051"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.2339",
    "kind": "arxiv",
    "version": 1
  }
}