Pith Number

pith:XAIXEYQS

pith:2017:XAIXEYQSFEYX5TCPAV2JLLJVCB

not attested not anchored not stored refs pending

Design of Improved Quasi-Cyclic Protograph-Based Raptor-Like LDPC Codes for Short Block-Lengths

Dariush Divsalar, Richard D. Wesel, Sudarsan V. S. Ranganathan

arxiv:1701.07531 v4 · 2017-01-26 · 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{XAIXEYQSFEYX5TCPAV2JLLJVCB}

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	2026-05-18T00:42:51.341960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b81172621229317ecc4f057495ad35107d2f1d22242eb99d3ac28e67f5b368be

Aliases

arxiv: 1701.07531 · arxiv_version: 1701.07531v4 · doi: 10.48550/arxiv.1701.07531 · pith_short_12: XAIXEYQSFEYX · pith_short_16: XAIXEYQSFEYX5TCP · pith_short_8: XAIXEYQS

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/XAIXEYQSFEYX5TCPAV2JLLJVCB \
  | 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: b81172621229317ecc4f057495ad35107d2f1d22242eb99d3ac28e67f5b368be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7270a8adeeafc888236d04c9acfef0dd44a675679cec4e8929d9a5e4e3696162",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2017-01-26T00:43:15Z",
    "title_canon_sha256": "12ba72257dabe8168462528b3ecd36fb5db01903cf5755baadae2d92881f6f8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.07531",
    "kind": "arxiv",
    "version": 4
  }
}