Pith Number

pith:BDVT7YVR

pith:2014:BDVT7YVRBPG6B77AFWKMIG4XXU

not attested not anchored not stored refs pending

Upper Bounds on the Minimum Distance of Quasi-Cyclic LDPC codes Revisited

Alexey Frolov, Pavel Rybin

arxiv:1401.2120 v1 · 2014-01-09 · 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{BDVT7YVRBPG6B77AFWKMIG4XXU}

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	2026-05-18T03:02:47.432859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08eb3fe2b10bcde0ffe02d94c41b97bd3dc44083fb5d51ed7a4f47f70232a606

Aliases

arxiv: 1401.2120 · arxiv_version: 1401.2120v1 · doi: 10.48550/arxiv.1401.2120 · pith_short_12: BDVT7YVRBPG6 · pith_short_16: BDVT7YVRBPG6B77A · pith_short_8: BDVT7YVR

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/BDVT7YVRBPG6B77AFWKMIG4XXU \
  | 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: 08eb3fe2b10bcde0ffe02d94c41b97bd3dc44083fb5d51ed7a4f47f70232a606

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6cd4d8a57353bca3e914b70afba26f09e03ac041f803629eed9ffa7758c0d48",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-01-09T19:08:45Z",
    "title_canon_sha256": "0cc9b787dcaaa024b9b78d9c6d3b144c02ff9a3b7c34c25e6e979e41b21fd9b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.2120",
    "kind": "arxiv",
    "version": 1
  }
}