Pith Number

pith:2UNEPNQT

pith:2006:2UNEPNQT7LBJQP27APFBGF2A7X

not attested not anchored not stored refs pending

Structure of Optimal Input Covariance Matrices for MIMO Systems with Covariance Feedback under General Correlated Fading

Holger Boche, Igor Bjelakovic

arxiv:cs/0601107 v2 · 2006-01-25 · 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{2UNEPNQT7LBJQP27APFBGF2A7X}

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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	2026-05-18T00:57:45.037872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d51a47b613fac2983f5f03ca131740fde0adf4f4837359160d9743c8d42f18e7

Aliases

arxiv: cs/0601107 · arxiv_version: cs/0601107v2 · doi: 10.48550/arxiv.cs/0601107 · pith_short_12: 2UNEPNQT7LBJ · pith_short_16: 2UNEPNQT7LBJQP27 · pith_short_8: 2UNEPNQT

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/2UNEPNQT7LBJQP27APFBGF2A7X \
  | 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: d51a47b613fac2983f5f03ca131740fde0adf4f4837359160d9743c8d42f18e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b56f98a2c485c797e5909c9500f956072ae47a1c799adfe24ad8c66e8ba1229",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "",
    "primary_cat": "cs.IT",
    "submitted_at": "2006-01-25T10:33:11Z",
    "title_canon_sha256": "c3018582cf6bf3ba51afb7c1041da186f0165ceaf6dbb3ec8babc436d9e5082b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0601107",
    "kind": "arxiv",
    "version": 2
  }
}