Pith Number

pith:T66LLL7Q

pith:2013:T66LLL7QZKSQDOKCQ7RJ2TKOLP

not attested not anchored not stored refs pending

Recovery of Sparse Matrices via Matrix Sketching

Pramod K. Varshney, Thakshila Wimalajeewa, Yonina C. Eldar

arxiv:1311.2448 v1 · 2013-11-11 · cs.NA · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T66LLL7QZKSQDOKCQ7RJ2TKOLP}

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	2026-05-18T03:07:32.605190Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fbcb5aff0caa501b94287e29d4d4e5bc28f3b1d239b0a7944000fe7f41ca3f6

Aliases

arxiv: 1311.2448 · arxiv_version: 1311.2448v1 · doi: 10.48550/arxiv.1311.2448 · pith_short_12: T66LLL7QZKSQ · pith_short_16: T66LLL7QZKSQDOKC · pith_short_8: T66LLL7Q

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/T66LLL7QZKSQDOKCQ7RJ2TKOLP \
  | 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: 9fbcb5aff0caa501b94287e29d4d4e5bc28f3b1d239b0a7944000fe7f41ca3f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da8827de1a61faecafb8532af5b62c87dbbd035c759a730d4b73c1f63a1fbf49",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2013-11-11T14:12:28Z",
    "title_canon_sha256": "baf043461774ca0afc0dc153c53cc6bf6666dd031befaa049a664f5e63f69b69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.2448",
    "kind": "arxiv",
    "version": 1
  }
}