Pith Number

pith:5LRFI7W4

pith:2015:5LRFI7W4AU7PXA3KPN7L7BGG2A

not attested not anchored not stored refs pending

Fast Spectral Low Rank Matrix Approximation

Haishan Ye, Zhihua Zhang

arxiv:1504.00523 v4 · 2015-04-02 · 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{5LRFI7W4AU7PXA3KPN7L7BGG2A}

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	2026-05-18T01:27:24.003605Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eae2547edc053efb836a7b7ebf84c6d03e85c8ca6e155888f01e900249f9b35b

Aliases

arxiv: 1504.00523 · arxiv_version: 1504.00523v4 · doi: 10.48550/arxiv.1504.00523 · pith_short_12: 5LRFI7W4AU7P · pith_short_16: 5LRFI7W4AU7PXA3K · pith_short_8: 5LRFI7W4

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/5LRFI7W4AU7PXA3KPN7L7BGG2A \
  | 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: eae2547edc053efb836a7b7ebf84c6d03e85c8ca6e155888f01e900249f9b35b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "393097760922bc0786316be70dc5c3d634342b23154d395e317e2a5f13bdebb4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2015-04-02T12:29:34Z",
    "title_canon_sha256": "a82e1749be1c94f07b36bca8ff61027b744a8c9258f495d56f36f9db53191bb4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.00523",
    "kind": "arxiv",
    "version": 4
  }
}