Pith Number

pith:77VHR3SB

pith:2010:77VHR3SBPLMYLX6QQCGJ5Z5DDH

not attested not anchored not stored refs pending

New Families of LDPC Block Codes Formed by Terminating Irregular Protograph-Based LDPC Convolutional Codes

Daniel J. Costello Jr., David G. M. Mitchell, Michael Lentmaier

arxiv:1005.1065 v1 · 2010-05-06 · 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{77VHR3SBPLMYLX6QQCGJ5Z5DDH}

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	2026-05-18T00:58:19.568587Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ffea78ee417ad985dfd0808c9ee7a319ce298a706e6ad679c80188b227e5c40e

Aliases

arxiv: 1005.1065 · arxiv_version: 1005.1065v1 · doi: 10.48550/arxiv.1005.1065 · pith_short_12: 77VHR3SBPLMY · pith_short_16: 77VHR3SBPLMYLX6Q · pith_short_8: 77VHR3SB

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/77VHR3SBPLMYLX6QQCGJ5Z5DDH \
  | 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: ffea78ee417ad985dfd0808c9ee7a319ce298a706e6ad679c80188b227e5c40e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0fad58e02c50830e3987df3a3ba7772e452223cc027e934c83db95ea5e9e19e6",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2010-05-06T19:56:11Z",
    "title_canon_sha256": "62c9c6b1295585b79878ad28dca1e3d07cdb730d66f9963fda095d113cf70cd8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.1065",
    "kind": "arxiv",
    "version": 1
  }
}