Pith Number

pith:NSC4FEGG

pith:2009:NSC4FEGGKQMCMEJTK4XKXLTB2K

not attested not anchored not stored refs pending

Design Guidelines for Training-based MIMO Systems with Feedback

Parastoo Sadeghi, Salman Durrani, Tharaka A. Lamahewa, Xiangyun Zhou

arxiv:0903.0443 v1 · 2009-03-03 · 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{NSC4FEGGKQMCMEJTK4XKXLTB2K}

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	2026-05-18T03:19:57.201268Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c85c290c65418261133572eabae61d29239660e64578479f3cba256a4e80733

Aliases

arxiv: 0903.0443 · arxiv_version: 0903.0443v1 · doi: 10.48550/arxiv.0903.0443 · pith_short_12: NSC4FEGGKQMC · pith_short_16: NSC4FEGGKQMCMEJT · pith_short_8: NSC4FEGG

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/NSC4FEGGKQMCMEJTK4XKXLTB2K \
  | 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: 6c85c290c65418261133572eabae61d29239660e64578479f3cba256a4e80733

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b5fdf7f8f889aa61f2b59883a65d22dc5a3dac5f441f6d4f080282b66659302",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-03-03T04:45:50Z",
    "title_canon_sha256": "42b7e7316aee8baf5ebca5865238ae9f4e3f566a83e554f0352854df4699786d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0443",
    "kind": "arxiv",
    "version": 1
  }
}