Pith Number

pith:LD55BTKO

pith:2013:LD55BTKOIAQLH6CESE5X27HXNB

not attested not anchored not stored refs pending

BICM Performance Improvement via Online LLR Optimization

Inyup Kang, Jinhong Wu, Jungwon Lee, Mostafa El-Khamy

arxiv:1303.4452 v1 · 2013-03-18 · 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{LD55BTKOIAQLH6CESE5X27HXNB}

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	2026-05-18T03:30:27.165337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

58fbd0cd4e4020b3f844913b7d7cf7686b65cef2f02bffec8685fb0ad14cca5f

Aliases

arxiv: 1303.4452 · arxiv_version: 1303.4452v1 · doi: 10.48550/arxiv.1303.4452 · pith_short_12: LD55BTKOIAQL · pith_short_16: LD55BTKOIAQLH6CE · pith_short_8: LD55BTKO

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/LD55BTKOIAQLH6CESE5X27HXNB \
  | 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: 58fbd0cd4e4020b3f844913b7d7cf7686b65cef2f02bffec8685fb0ad14cca5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25d373133f9bb45f502152e25889d168f023971c4e20ec02907ff5db17a9cf77",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-03-18T22:56:49Z",
    "title_canon_sha256": "ddc9048a18b3349c5cccf241f35e386fc4306c5a9837e13d56fe6a3d2e03a601"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.4452",
    "kind": "arxiv",
    "version": 1
  }
}