Pith Number

pith:GE4R4TJW

pith:2021:GE4R4TJWOXCLEFEFN6P6GQTTR5

not attested not anchored not stored refs pending

Structured Covariance Matrix Estimation with Missing-Data for Radar Applications via Expectation-Maximization

Antonio De Maio, Augusto Aubry, Massimo Rosamilia, Stefano Marano

arxiv:2105.03738 v1 · 2021-05-08 · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GE4R4TJWOXCLEFEFN6P6GQTTR5}

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	2026-07-05T05:23:28.409602Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31391e4d3675c4b214856f9fe342738f48098add27138001f57d6df6e9a63552

Aliases

arxiv: 2105.03738 · arxiv_version: 2105.03738v1 · doi: 10.48550/arxiv.2105.03738 · pith_short_12: GE4R4TJWOXCL · pith_short_16: GE4R4TJWOXCLEFEF · pith_short_8: GE4R4TJW

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/GE4R4TJWOXCLEFEFN6P6GQTTR5 \
  | 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: 31391e4d3675c4b214856f9fe342738f48098add27138001f57d6df6e9a63552

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b1f769e0ff13450a02a1bd35cd9f2512eec5db7cfd5b76158a2b6a5f789cd6b5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2021-05-08T16:51:37Z",
    "title_canon_sha256": "2bf11fe6e7f783f81490be7bfd9d3ad96060a6218e2f759e3efa9331f54b60ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.03738",
    "kind": "arxiv",
    "version": 1
  }
}