Pith Number

pith:N3Q2H5QZ

pith:2010:N3Q2H5QZUT3EMDPEPCCWVGTM27

not attested not anchored not stored refs pending

Tree-Structure Expectation Propagation for LDPC Decoding in Erasure Channels

Fernando P\'erez-Cruz, Juan Jos\'e Murillo-Fuentes, Pablo M. Olmos

arxiv:1009.4287 v3 · 2010-09-22 · 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{N3Q2H5QZUT3EMDPEPCCWVGTM27}

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	2026-05-18T04:05:16.576737Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ee1a3f619a4f6460de478856a9a6cd7cb66c8ea5683e3d9cceaefcdca3ec164

Aliases

arxiv: 1009.4287 · arxiv_version: 1009.4287v3 · doi: 10.48550/arxiv.1009.4287 · pith_short_12: N3Q2H5QZUT3E · pith_short_16: N3Q2H5QZUT3EMDPE · pith_short_8: N3Q2H5QZ

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/N3Q2H5QZUT3EMDPEPCCWVGTM27 \
  | 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: 6ee1a3f619a4f6460de478856a9a6cd7cb66c8ea5683e3d9cceaefcdca3ec164

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6cf74e962d79ac354bdb000beec4ff88be74dbeea25db90fca25ea3f2f0da6e",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2010-09-22T08:15:41Z",
    "title_canon_sha256": "28f2bd4a7db4ab9e2e875b57b7e1400063412ace11195493d2eeee5f474cdbdb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.4287",
    "kind": "arxiv",
    "version": 3
  }
}