Pith Number

pith:FXKUPT47

pith:2011:FXKUPT47UCKBUULW72KF4EZFBI

not attested not anchored not stored refs pending

Threshold Improvement of Low-Density Lattice Codes via Spatial Coupling

Brian M. Kurkoski, Hironori Uchikawa, Kenta Kasai, Kohichi Sakaniwa

arxiv:1107.4900 v1 · 2011-07-25 · 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{FXKUPT47UCKBUULW72KF4EZFBI}

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	2026-05-18T04:16:54.323047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2dd547cf9fa0941a5176fe945e13250a17c8710787367d282ffae52cce814318

Aliases

arxiv: 1107.4900 · arxiv_version: 1107.4900v1 · doi: 10.48550/arxiv.1107.4900 · pith_short_12: FXKUPT47UCKB · pith_short_16: FXKUPT47UCKBUULW · pith_short_8: FXKUPT47

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/FXKUPT47UCKBUULW72KF4EZFBI \
  | 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: 2dd547cf9fa0941a5176fe945e13250a17c8710787367d282ffae52cce814318

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b45b1edf5b78f9e2e39eea001f3cf691fcc7e3a52d8749d37176b06dfef9d215",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-07-25T11:30:03Z",
    "title_canon_sha256": "88dbb8722f4791a57f4fa2e0adedaed5851af0b306aec0d414f89dfd7242037d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.4900",
    "kind": "arxiv",
    "version": 1
  }
}