Pith Number

pith:T6FEBWCI

pith:2010:T6FEBWCIUGP76VWTUYPPMO2GHV

not attested not anchored not stored refs pending

Cyclic and Quasi-Cyclic LDPC Codes on Row and Column Constrained Parity-Check Matrices and Their Trapping Sets

Khaled Abdel-Ghaffar, Qin Huang, Qiuju Diao, Shu Lin

arxiv:1012.3201 v1 · 2010-12-15 · 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{T6FEBWCIUGP76VWTUYPPMO2GHV}

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	2026-05-18T04:33:17.542414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f8a40d848a19fff56d3a61ef63b463d574b805f2df97d785b18d56c95df24f0

Aliases

arxiv: 1012.3201 · arxiv_version: 1012.3201v1 · doi: 10.48550/arxiv.1012.3201 · pith_short_12: T6FEBWCIUGP7 · pith_short_16: T6FEBWCIUGP76VWT · pith_short_8: T6FEBWCI

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/T6FEBWCIUGP76VWTUYPPMO2GHV \
  | 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: 9f8a40d848a19fff56d3a61ef63b463d574b805f2df97d785b18d56c95df24f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89c7a57b95cf710c544a913b174c32873f0dcffa4e8e993506bd113ced0d2433",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2010-12-15T00:39:43Z",
    "title_canon_sha256": "6d5b24b99ef304eef6a10198b290625a49400d5093a76fee0d9d810d75f23a66"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.3201",
    "kind": "arxiv",
    "version": 1
  }
}