Pith Number

pith:R5AD6CFO

pith:2009:R5AD6CFO3NWRIHXOEVGBIJSUHP

not attested not anchored not stored refs pending

Finding structure with randomness: Probabilistic algorithms for constructing approximate matrix decompositions

Joel A. Tropp, Nathan Halko, Per-Gunnar Martinsson

arxiv:0909.4061 v2 · 2009-09-22 · math.NA · math.PR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R5AD6CFO3NWRIHXOEVGBIJSUHP}

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

Reduced-Order Surrogates for Forced Flexible Mesh Coastal-Ocean Models

Receipt and verification

First computed	2026-05-18T02:53:16.020144Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f403f08aedb6d141eee254c1426543bf8f2b6c8fe2cf6640e321d82884f2945

Aliases

arxiv: 0909.4061 · arxiv_version: 0909.4061v2 · doi: 10.48550/arxiv.0909.4061 · pith_short_12: R5AD6CFO3NWR · pith_short_16: R5AD6CFO3NWRIHXO · pith_short_8: R5AD6CFO

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/R5AD6CFO3NWRIHXOEVGBIJSUHP \
  | 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: 8f403f08aedb6d141eee254c1426543bf8f2b6c8fe2cf6640e321d82884f2945

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3faaaf15e6c883c5396f9fb0c7ad88c909ac5ccf04341ec6d4bef41417aa357b",
    "cross_cats_sorted": [
      "math.PR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-09-22T18:35:27Z",
    "title_canon_sha256": "254a38aee7c5a5a80dbddc80fa23f54538e4ef6c2cc400d9270e514cf8ee60b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.4061",
    "kind": "arxiv",
    "version": 2
  }
}