Pith Number

pith:NNQUXGRA

pith:2018:NNQUXGRAFRYNJNUGWC3VTCWQTH

not attested not anchored not stored refs pending

Efficient Search of QC-LDPC Codes with Girths 6 and 8 and Free of Elementary Trapping Sets with Small Size

Farzane Amirzade, Mohammad-Reza Sadeghi

arxiv:1803.08141 v1 · 2018-03-21 · 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{NNQUXGRAFRYNJNUGWC3VTCWQTH}

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	2026-05-18T00:20:23.578460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b614b9a202c70d4b686b0b7598ad099c4293eba176eba5a2549574d82056163

Aliases

arxiv: 1803.08141 · arxiv_version: 1803.08141v1 · doi: 10.48550/arxiv.1803.08141 · pith_short_12: NNQUXGRAFRYN · pith_short_16: NNQUXGRAFRYNJNUG · pith_short_8: NNQUXGRA

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/NNQUXGRAFRYNJNUGWC3VTCWQTH \
  | 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: 6b614b9a202c70d4b686b0b7598ad099c4293eba176eba5a2549574d82056163

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "700dc2ffc2c88bde533a2de6b5a45d673c7b37e23543fe28cbac1be56585c642",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2018-03-21T21:08:26Z",
    "title_canon_sha256": "d6ecd58d918261486b7a5c869acad60b1dd3711ebd9329ffe4708a5df107883c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.08141",
    "kind": "arxiv",
    "version": 1
  }
}