Pith Number

pith:XDBRNCWO

pith:2014:XDBRNCWO3DVIHHRRCVSVIEU6S7

not attested not anchored not stored refs pending

Efficient Algorithms for CUR and Interpolative Matrix Decompositions

Per-Gunnar Martinsson, Sergey Voronin

arxiv:1412.8447 v3 · 2014-12-29 · 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{XDBRNCWO3DVIHHRRCVSVIEU6S7}

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	2026-05-18T01:01:52.475218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8c3168aced8ea839e31156554129e97c8c84f256fe100f3c7d154495270aa76

Aliases

arxiv: 1412.8447 · arxiv_version: 1412.8447v3 · doi: 10.48550/arxiv.1412.8447 · pith_short_12: XDBRNCWO3DVI · pith_short_16: XDBRNCWO3DVIHHRR · pith_short_8: XDBRNCWO

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/XDBRNCWO3DVIHHRRCVSVIEU6S7 \
  | 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: b8c3168aced8ea839e31156554129e97c8c84f256fe100f3c7d154495270aa76

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b87c73b8be722ad7105740cf329014be238e3b3a2ef1f2e044e7bc494427c1e2",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-12-29T20:27:33Z",
    "title_canon_sha256": "a22885e7fba978ae240916b6887bd97c9af470bcbdcdce9637eff3f6e3d9fecd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.8447",
    "kind": "arxiv",
    "version": 3
  }
}