Pith Number

pith:2QXGFQF6

pith:2007:2QXGFQF66CWCA4W6HG6LVXM4MX

not attested not anchored not stored refs pending

Optimal Throughput-Diversity-Delay Tradeoff in MIMO ARQ Block-Fading Channels

Albert Guillen i Fabregas, Allen Chuang, Iain B. Collings, Lars K. Rasmussen

arxiv:cs/0701126 v1 · 2007-01-20 · 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{2QXGFQF66CWCA4W6HG6LVXM4MX}

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	2026-05-18T00:58:56.202931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d42e62c0bef0ac2072de39bcbadd9c65f0967efda984d6af39f67bde5ea8351a

Aliases

arxiv: cs/0701126 · arxiv_version: cs/0701126v1 · doi: 10.48550/arxiv.cs/0701126 · pith_short_12: 2QXGFQF66CWC · pith_short_16: 2QXGFQF66CWCA4W6 · pith_short_8: 2QXGFQF6

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/2QXGFQF66CWCA4W6HG6LVXM4MX \
  | 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: d42e62c0bef0ac2072de39bcbadd9c65f0967efda984d6af39f67bde5ea8351a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc50711a3cfe9eb7cbca78a0deb57a783f2fc875bba18299b9446b5ea7555463",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "",
    "primary_cat": "cs.IT",
    "submitted_at": "2007-01-20T04:01:17Z",
    "title_canon_sha256": "cc357a950923784e5442f943df6bf2c17be09d4e116a2ad000198f9458482928"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0701126",
    "kind": "arxiv",
    "version": 1
  }
}