Pith Number

pith:HZWTVYB7

pith:2007:HZWTVYB7HOJMGAWSHQJQWW4JPI

not attested not anchored not stored refs pending

The Design of Efficiently-Encodable Rate-Compatible LDPC Codes

Aditya Ramamoorthy, Jaehong Kim, Steven W. McLaughlin

arxiv:0705.0543 v1 · 2007-05-03 · 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{HZWTVYB7HOJMGAWSHQJQWW4JPI}

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	2026-05-18T00:58:02.411683Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e6d3ae03f3b92c302d23c130b5b897a3444aac1dcdf59227b2aa888967cf34f

Aliases

arxiv: 0705.0543 · arxiv_version: 0705.0543v1 · doi: 10.48550/arxiv.0705.0543 · pith_short_12: HZWTVYB7HOJM · pith_short_16: HZWTVYB7HOJMGAWS · pith_short_8: HZWTVYB7

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/HZWTVYB7HOJMGAWSHQJQWW4JPI \
  | 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: 3e6d3ae03f3b92c302d23c130b5b897a3444aac1dcdf59227b2aa888967cf34f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "365b7624a01345474b3fdcf4ca364e5e9ed736192fe620afdd6b26e75fe93198",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "",
    "primary_cat": "cs.IT",
    "submitted_at": "2007-05-03T22:17:51Z",
    "title_canon_sha256": "d5cb0d66281b4b3040d6722f03d739431f839f4e31b2409b8b6cbe249a53e991"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.0543",
    "kind": "arxiv",
    "version": 1
  }
}