Pith Number

pith:F4JJ5C5F

pith:2017:F4JJ5C5FGBRLWNWRBBSXP6ZIPN

not attested not anchored not stored refs pending

Lower bounds on the lifting degree of single-edge and multiple-edge QC-LDPC codes by difference matrices

Farzane Amirzade, Mohammad-Reza Sadeghi

arxiv:1709.00825 v1 · 2017-09-04 · 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{F4JJ5C5FGBRLWNWRBBSXP6ZIPN}

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	2026-05-18T00:36:05.019075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f129e8ba53062bb36d1086577fb287b79c576ac9a0c412dfaa48ad9231c471f

Aliases

arxiv: 1709.00825 · arxiv_version: 1709.00825v1 · doi: 10.48550/arxiv.1709.00825 · pith_short_12: F4JJ5C5FGBRL · pith_short_16: F4JJ5C5FGBRLWNWR · pith_short_8: F4JJ5C5F

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/F4JJ5C5FGBRLWNWRBBSXP6ZIPN \
  | 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: 2f129e8ba53062bb36d1086577fb287b79c576ac9a0c412dfaa48ad9231c471f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8b5bf5a61a57ff4cd3ba59f90f3fff6db430e39a6ba328f226dadf93a6079c9",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2017-09-04T06:26:28Z",
    "title_canon_sha256": "f7c48a95c226c1ad628348b12c262844945caa1981a82cf63afd7c5397ac70bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.00825",
    "kind": "arxiv",
    "version": 1
  }
}