Pith Number

pith:CFSQVKC5

pith:2013:CFSQVKC52FSK5OENJQLHANPLOL

not attested not anchored not stored refs pending

On the Convergence Speed of Spatially Coupled LDPC Ensembles

Laurent Schmalen, Stephan ten Brink, Vahid Aref

arxiv:1307.3780 v1 · 2013-07-14 · 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{CFSQVKC52FSK5OENJQLHANPLOL}

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	2026-05-18T03:18:27.904042Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11650aa85dd164aeb88d4c167035eb72cac298d7d91a103ab2f296ff331026ce

Aliases

arxiv: 1307.3780 · arxiv_version: 1307.3780v1 · doi: 10.48550/arxiv.1307.3780 · pith_short_12: CFSQVKC52FSK · pith_short_16: CFSQVKC52FSK5OEN · pith_short_8: CFSQVKC5

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/CFSQVKC52FSK5OENJQLHANPLOL \
  | 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: 11650aa85dd164aeb88d4c167035eb72cac298d7d91a103ab2f296ff331026ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4014dc420c4a915bdba592918fe295967a70673ff9746cfac5bb95affe97c2ba",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-07-14T20:52:55Z",
    "title_canon_sha256": "a28e94f2ee003b0b97309d36af0080439497d98e270f2aa168ed64e8bec64bf1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.3780",
    "kind": "arxiv",
    "version": 1
  }
}