Pith Number

pith:74ENZH4K

pith:2014:74ENZH4KLEUA3GUAFHNZLHZPQU

not attested not anchored not stored refs pending

Protograph-Based Raptor-Like LDPC Codes

Dariush Divsalar, Kasra Vakilinia, Richard D. Wesel, Tsung-Yi Chen

arxiv:1403.2111 v1 · 2014-03-09 · 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{74ENZH4KLEUA3GUAFHNZLHZPQU}

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	2026-05-18T02:56:50.855655Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff08dc9f8a59280d9a8029db959f2f85361e9acc8fc5dfbf434a3ff0ba709e43

Aliases

arxiv: 1403.2111 · arxiv_version: 1403.2111v1 · doi: 10.48550/arxiv.1403.2111 · pith_short_12: 74ENZH4KLEUA · pith_short_16: 74ENZH4KLEUA3GUA · pith_short_8: 74ENZH4K

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/74ENZH4KLEUA3GUAFHNZLHZPQU \
  | 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: ff08dc9f8a59280d9a8029db959f2f85361e9acc8fc5dfbf434a3ff0ba709e43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e9804d0fed7e4a3966f0b98935165a837d78da590a2f5c9fa90780adddb8c26",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-03-09T22:41:52Z",
    "title_canon_sha256": "79097bbe3f68746e26c852f83c351842b46146355ffe6fefee9ee8d091cb354e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.2111",
    "kind": "arxiv",
    "version": 1
  }
}