Pith Number

pith:YTIPHXLM

pith:2015:YTIPHXLM4DMKPWCPBARE5PQPNB

not attested not anchored not stored refs pending

Sketching for Simultaneously Sparse and Low-Rank Covariance Matrices

Justin Romberg, Sohail Bahmani

arxiv:1510.01670 v2 · 2015-10-06 · cs.IT · math.IT · math.NA · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YTIPHXLM4DMKPWCPBARE5PQPNB}

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	2026-05-18T01:30:48.565073Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4d0f3dd6ce0d8a7d84f08224ebe0f68495004f1568a8683d5654af49d46b419

Aliases

arxiv: 1510.01670 · arxiv_version: 1510.01670v2 · doi: 10.48550/arxiv.1510.01670 · pith_short_12: YTIPHXLM4DMK · pith_short_16: YTIPHXLM4DMKPWCP · pith_short_8: YTIPHXLM

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/YTIPHXLM4DMKPWCPBARE5PQPNB \
  | 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: c4d0f3dd6ce0d8a7d84f08224ebe0f68495004f1568a8683d5654af49d46b419

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56509cdcbd083396dbc1d612cc1d6e5d28e8622821764bdca34952da87473dd4",
    "cross_cats_sorted": [
      "math.IT",
      "math.NA",
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-10-06T17:13:00Z",
    "title_canon_sha256": "e8e21a6e84e1a19e1067790ec2265951ebf0fd2be509439c5991c6f347d57c81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.01670",
    "kind": "arxiv",
    "version": 2
  }
}