Pith Number

pith:W5BJUVCJ

pith:2014:W5BJUVCJELEYL6PYOCBRJMCSPU

not attested not anchored not stored refs pending

A Subspace Method for Array Covariance Matrix Estimation

George Atia, Mostafa Rahmani

arxiv:1411.0622 v1 · 2014-10-20 · cs.NA · cs.IT · math.IT · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W5BJUVCJELEYL6PYOCBRJMCSPU}

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	2026-05-18T02:38:44.966745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7429a544922c985f9f8708314b0527d16a6b2a3912fc047c472004e3f58902b

Aliases

arxiv: 1411.0622 · arxiv_version: 1411.0622v1 · doi: 10.48550/arxiv.1411.0622 · pith_short_12: W5BJUVCJELEY · pith_short_16: W5BJUVCJELEYL6PY · pith_short_8: W5BJUVCJ

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/W5BJUVCJELEYL6PYOCBRJMCSPU \
  | 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: b7429a544922c985f9f8708314b0527d16a6b2a3912fc047c472004e3f58902b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "788ea2a670e6c237b93d4f5e6c40111d9833c9017cf72bbc0c6d3dd28a0d01f1",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT",
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2014-10-20T02:00:58Z",
    "title_canon_sha256": "a2a9ab7697c8cccebc5c18aefde607ce2bd78fdfadbf9d199aa06ae223a68773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.0622",
    "kind": "arxiv",
    "version": 1
  }
}