Pith Number

pith:OQQQRBZ6

pith:2014:OQQQRBZ67OAA3VJ2EO734PIGO3

not attested not anchored not stored refs pending

Repeat Accumulate Based Designs for LDPC Codes on Fading Channels

A. G. D. Uchoa, C. T. Healy, R. C. de Lamare

arxiv:1402.5692 v1 · 2014-02-24 · 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{OQQQRBZ67OAA3VJ2EO734PIGO3}

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	2026-05-18T02:58:13.983558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

742108873efb800dd53a23bfbe3d0676ef6376d1e0ebb6ea31966f1124d6e868

Aliases

arxiv: 1402.5692 · arxiv_version: 1402.5692v1 · doi: 10.48550/arxiv.1402.5692 · pith_short_12: OQQQRBZ67OAA · pith_short_16: OQQQRBZ67OAA3VJ2 · pith_short_8: OQQQRBZ6

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/OQQQRBZ67OAA3VJ2EO734PIGO3 \
  | 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: 742108873efb800dd53a23bfbe3d0676ef6376d1e0ebb6ea31966f1124d6e868

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0345cc37fddf74d2d0ab959b04324112b426bd39e75c3e8ee9631134aa6150d8",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-02-24T00:09:28Z",
    "title_canon_sha256": "55b1b1bcb8be7c66ef6316aa26daf28094f1794f84994f3aaf1f262d77e35f00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.5692",
    "kind": "arxiv",
    "version": 1
  }
}