Pith Number

pith:C5PPDRW5

pith:2022:C5PPDRW5GVTYNK2SPGMFONAKLE

not attested not anchored not stored refs pending

Randomized Compression of Rank-Structured Matrices Accelerated with Graph Coloring

James Levitt, Per-Gunnar Martinsson

arxiv:2205.03406 v2 · 2022-05-06 · 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{C5PPDRW5GVTYNK2SPGMFONAKLE}

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	2026-07-05T08:35:17.577797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

175ef1c6dd356786ab52799857340a590885cae890757efa007c94cdc5009a86

Aliases

arxiv: 2205.03406 · arxiv_version: 2205.03406v2 · doi: 10.48550/arxiv.2205.03406 · pith_short_12: C5PPDRW5GVTY · pith_short_16: C5PPDRW5GVTYNK2S · pith_short_8: C5PPDRW5

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/C5PPDRW5GVTYNK2SPGMFONAKLE \
  | 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: 175ef1c6dd356786ab52799857340a590885cae890757efa007c94cdc5009a86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "882bd5453fce9f421b2ffa7397362384bbeca9339d77a670479e3408db46c3a9",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2022-05-06T09:39:14Z",
    "title_canon_sha256": "052db3a08092c19bb656e16fb5159141841d2315a3293f6a3da4a952836ccaa4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2205.03406",
    "kind": "arxiv",
    "version": 2
  }
}