Pith Number

pith:RZXQG3FI

pith:2011:RZXQG3FIC74FGOQTRHM3A2ZFOC

not attested not anchored not stored refs pending

Hierarchical and High-Girth QC LDPC Codes

Jonathan S. Yedidia, Stark C. Draper, Yige Wang

arxiv:1111.0711 v1 · 2011-11-03 · 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{RZXQG3FIC74FGOQTRHM3A2ZFOC}

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	2026-05-18T00:58:18.644771Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e6f036ca817f8533a1389d9b06b2570b4b010f78484d42a004716870664f7bb

Aliases

arxiv: 1111.0711 · arxiv_version: 1111.0711v1 · doi: 10.48550/arxiv.1111.0711 · pith_short_12: RZXQG3FIC74F · pith_short_16: RZXQG3FIC74FGOQT · pith_short_8: RZXQG3FI

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/RZXQG3FIC74FGOQTRHM3A2ZFOC \
  | 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: 8e6f036ca817f8533a1389d9b06b2570b4b010f78484d42a004716870664f7bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37c02c42dbd81f25562d1df1392aaa2a9d9881e69e4494d84f31c99aa9448b71",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-11-03T01:54:49Z",
    "title_canon_sha256": "855d0d3acd7ceaa6e6abfd651672928bf8d607744bd30e09dc9c47b33fd53eb2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.0711",
    "kind": "arxiv",
    "version": 1
  }
}