Pith Number

pith:RC5B3TZU

pith:2009:RC5B3TZU3QAILNU5PNZDRTGXTY

not attested not anchored not stored refs pending

Efficient LDPC Codes over GF(q) for Lossy Data Compression

Alfredo Braunstein, Farbod Kayhan, Riccardo Zecchina

arxiv:0901.4467 v2 · 2009-01-28 · cs.IT · math.IT

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RC5B3TZU3QAILNU5PNZDRTGXTY}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:57:58.303843Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88ba1dcf34dc0085b69d7b7238ccd79e1d428db48229ffdda285f7db84152007

Aliases

arxiv: 0901.4467 · arxiv_version: 0901.4467v2 · doi: 10.48550/arxiv.0901.4467 · pith_short_12: RC5B3TZU3QAI · pith_short_16: RC5B3TZU3QAILNU5 · pith_short_8: RC5B3TZU

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/RC5B3TZU3QAILNU5PNZDRTGXTY \
  | 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: 88ba1dcf34dc0085b69d7b7238ccd79e1d428db48229ffdda285f7db84152007

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc976f23a4dfcefff50cd8ec1675e4d2b4abc8082220ba1b0652c3f9d15469e5",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-01-28T14:13:24Z",
    "title_canon_sha256": "bebe62d54f2418647b6bf966c19c3d0787ab1d8a0073384f5b09d9d8a45c1f13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4467",
    "kind": "arxiv",
    "version": 2
  }
}