Pith Number

pith:XM6KMSNC

pith:2019:XM6KMSNCHGJSW327NWUHVPK4S6

not attested not anchored not stored refs pending

Cram\'er-Rao Bounds for Complex-Valued Independent Component Extraction: Determined and Piecewise Determined Mixing Models

Petr Tichavsk\'y, V\'aclav Kautsk\'y, Vicente Zarzoso, Zbyn\v{e}k Koldovsk\'y

arxiv:1907.08790 v1 · 2019-07-20 · math.ST · eess.SP · 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{XM6KMSNCHGJSW327NWUHVPK4S6}

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	2026-07-05T01:46:41.884270Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb3ca649a239932b6f5f6da87abd5c97ba61b8510d859012c44d419372255be0

Aliases

arxiv: 1907.08790 · arxiv_version: 1907.08790v1 · doi: 10.48550/arxiv.1907.08790 · pith_short_12: XM6KMSNCHGJS · pith_short_16: XM6KMSNCHGJSW327 · pith_short_8: XM6KMSNC

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/XM6KMSNCHGJSW327NWUHVPK4S6 \
  | 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: bb3ca649a239932b6f5f6da87abd5c97ba61b8510d859012c44d419372255be0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30222a6f465ffde437012c8da5f52e605c7134ab83f796595ed1df7abe8ed504",
    "cross_cats_sorted": [
      "eess.SP",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2019-07-20T10:02:50Z",
    "title_canon_sha256": "b43646ae41559e1821449e89624abfa639a180830731895423ccddb30da97d5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.08790",
    "kind": "arxiv",
    "version": 1
  }
}