Pith Number

pith:ESMJLLLQ

pith:2019:ESMJLLLQM7K4YKKOQS7NHSLMHZ

not attested not anchored not stored refs pending

CUR Decompositions, Approximations, and Perturbations

Keaton Hamm, Longxiu Huang

arxiv:1903.09698 v2 · 2019-03-22 · math.NA · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ESMJLLLQM7K4YKKOQS7NHSLMHZ}

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	2026-05-17T23:49:28.624575Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

249895ad7067d5cc294e84bed3c96c3e41730e832ddbd01f46315a9d05dcdbb8

Aliases

arxiv: 1903.09698 · arxiv_version: 1903.09698v2 · doi: 10.48550/arxiv.1903.09698 · pith_short_12: ESMJLLLQM7K4 · pith_short_16: ESMJLLLQM7K4YKKO · pith_short_8: ESMJLLLQ

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/ESMJLLLQM7K4YKKOQS7NHSLMHZ \
  | 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: 249895ad7067d5cc294e84bed3c96c3e41730e832ddbd01f46315a9d05dcdbb8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6252bb0369d17a4079b9342fc0c3419aac77e57081eb0a516f52254f246b11dd",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-03-22T20:26:03Z",
    "title_canon_sha256": "d472cbc7c9955c09db68b5159b07d1346068a9625c9a28efc097550d981fbce2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.09698",
    "kind": "arxiv",
    "version": 2
  }
}