Pith Number

pith:WCSMVHMQ

pith:2019:WCSMVHMQ356PNX5A64AVAZAMNY

not attested not anchored not stored refs pending

Low-rank approximation in the Frobenius norm by column and row subset selection

Alice Cortinovis, Daniel Kressner

arxiv:1908.06059 v1 · 2019-08-16 · math.NA · cs.DS · 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{WCSMVHMQ356PNX5A64AVAZAMNY}

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	2026-07-04T23:58:01.013241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0a4ca9d90df7cf6dfa0f70150640c6e3529246ba36c3ae622085f92002d7e0c

Aliases

arxiv: 1908.06059 · arxiv_version: 1908.06059v1 · doi: 10.48550/arxiv.1908.06059 · pith_short_12: WCSMVHMQ356P · pith_short_16: WCSMVHMQ356PNX5A · pith_short_8: WCSMVHMQ

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/WCSMVHMQ356PNX5A64AVAZAMNY \
  | 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: b0a4ca9d90df7cf6dfa0f70150640c6e3529246ba36c3ae622085f92002d7e0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6eab1c8837b0058e094232e5071c8cd62dd58fcfff64f1e1e1afbc34c89d10e9",
    "cross_cats_sorted": [
      "cs.DS",
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-08-16T17:08:08Z",
    "title_canon_sha256": "aa7d282ac68dcc9f4ffcdf717e482c616ca14dddfdd76714a7661c84a7474f8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06059",
    "kind": "arxiv",
    "version": 1
  }
}