Pith Number

pith:OOAYDTU2

pith:2012:OOAYDTU2HCNTQ4VNCDZ6CZ23UU

not attested not anchored not stored refs pending

Spectral Shape of Doubly-Generalized LDPC Codes: Efficient and Exact Evaluation

Enrico Paolini, Marco Chiani, Marc P. C. Fossorier, Mark F. Flanagan

arxiv:1204.2435 v2 · 2012-04-11 · 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{OOAYDTU2HCNTQ4VNCDZ6CZ23UU}

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	2026-05-18T00:58:04.811211Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

738181ce9a389b3872ad10f3e1675ba53f42b73af8ed0af8b5e23ffe1e9c9ec9

Aliases

arxiv: 1204.2435 · arxiv_version: 1204.2435v2 · doi: 10.48550/arxiv.1204.2435 · pith_short_12: OOAYDTU2HCNT · pith_short_16: OOAYDTU2HCNTQ4VN · pith_short_8: OOAYDTU2

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/OOAYDTU2HCNTQ4VNCDZ6CZ23UU \
  | 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: 738181ce9a389b3872ad10f3e1675ba53f42b73af8ed0af8b5e23ffe1e9c9ec9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0c4147a741a3831841df343fb787d90c24b77a52fa1026aa03774323355eab4",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-04-11T13:02:27Z",
    "title_canon_sha256": "968f6887d15392cda5cd544309f865505321c0d021a5d189bf045f472d8aea9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2435",
    "kind": "arxiv",
    "version": 2
  }
}