Pith Number

pith:T3ZZ3Y43

pith:2009:T3ZZ3Y43HSOA6R7CIDYS366DB2

not attested not anchored not stored refs pending

Frequency Domain Hybrid-ARQ Chase Combining for Broadband MIMO CDMA Systems

Athanasios V. Vasilakos, Houda Chafnaji, Samir Saoudi, Tarik Ait-Idir

arxiv:0904.4789 v1 · 2009-04-30 · 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{T3ZZ3Y43HSOA6R7CIDYS366DB2}

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	2026-05-18T00:58:48.135626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ef39de39b3c9c0f47e240f12dfbc30e924548b9cc156fc1bf21c6d6beee5e22

Aliases

arxiv: 0904.4789 · arxiv_version: 0904.4789v1 · doi: 10.48550/arxiv.0904.4789 · pith_short_12: T3ZZ3Y43HSOA · pith_short_16: T3ZZ3Y43HSOA6R7C · pith_short_8: T3ZZ3Y43

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/T3ZZ3Y43HSOA6R7CIDYS366DB2 \
  | 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: 9ef39de39b3c9c0f47e240f12dfbc30e924548b9cc156fc1bf21c6d6beee5e22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e6e7692f9ecf5b681f5598360b9fa7be8e1f51e753397232a2ec44f6f549912f",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-04-30T13:22:44Z",
    "title_canon_sha256": "3fde5fa29fcb2482215e58e3c6c10bbed8942824167068d721216cb0e53769db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4789",
    "kind": "arxiv",
    "version": 1
  }
}