Pith Number

pith:TW7P66WY

pith:2009:TW7P66WYBABIWJTW2QYSR3IIWZ

not attested not anchored not stored refs pending

On the Iterative Decoding of High-Rate LDPC Codes With Applications in Compressed Sensing

Fan Zhang, Henry D. Pfister

arxiv:0903.2232 v4 · 2009-03-12 · 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{TW7P66WYBABIWJTW2QYSR3IIWZ}

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	2026-05-18T04:03:32.768930Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9dbeff7ad808028b2676d43128ed08b66b08f765e5e2b0a0e5c1c7f0afd8eb39

Aliases

arxiv: 0903.2232 · arxiv_version: 0903.2232v4 · doi: 10.48550/arxiv.0903.2232 · pith_short_12: TW7P66WYBABI · pith_short_16: TW7P66WYBABIWJTW · pith_short_8: TW7P66WY

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/TW7P66WYBABIWJTW2QYSR3IIWZ \
  | 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: 9dbeff7ad808028b2676d43128ed08b66b08f765e5e2b0a0e5c1c7f0afd8eb39

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "21ce41fdeb51002234d848665e08f64a9cadb971327cbca65989c48922d6f3c2",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-03-12T18:26:10Z",
    "title_canon_sha256": "0cb485d3cac23d2263fbda2e9ff3a1f9732063ebb44713a11b3b0c66eceb6eac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.2232",
    "kind": "arxiv",
    "version": 4
  }
}