Pith Number

pith:VY6XA5BJ

pith:2023:VY6XA5BJNTYI7WDDFLML7RVGS5

not attested not anchored not stored refs pending

Making the Nystr\"om method highly accurate for low-rank approximations

Jianlin Xia

arxiv:2307.05785 v1 · 2023-07-11 · math.NA · cs.LG · 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{VY6XA5BJNTYI7WDDFLML7RVGS5}

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	2026-07-05T06:30:12.415236Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ae3d7074296cf08fd8632ad8bfc6a6976dfb3b3d18bc28f89a1e18946a3ee395

Aliases

arxiv: 2307.05785 · arxiv_version: 2307.05785v1 · doi: 10.48550/arxiv.2307.05785 · pith_short_12: VY6XA5BJNTYI · pith_short_16: VY6XA5BJNTYI7WDD · pith_short_8: VY6XA5BJ

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/VY6XA5BJNTYI7WDDFLML7RVGS5 \
  | 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: ae3d7074296cf08fd8632ad8bfc6a6976dfb3b3d18bc28f89a1e18946a3ee395

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b143132e0eabfca1bf53b956dc04387dcf5d2f9dd3062562f03c6730ccb3194",
    "cross_cats_sorted": [
      "cs.LG",
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2023-07-11T20:25:46Z",
    "title_canon_sha256": "116a85213827549900559553ecf5bd8d2f07bf47432ba55ab074afeaffdaaa76"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2307.05785",
    "kind": "arxiv",
    "version": 1
  }
}