Pith Number

pith:VFRV4QVI

pith:2013:VFRV4QVI55SKLWB66ZQYCWC2GJ

not attested not anchored not stored refs pending

Threshold Saturation for Spatially-Coupled LDPC and LDGM Codes on BMS Channels

Andrew J. Young, Henry D. Pfister, Nicolas Macris, Santhosh Kumar

arxiv:1309.7543 v2 · 2013-09-29 · 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{VFRV4QVI55SKLWB66ZQYCWC2GJ}

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	2026-05-18T02:29:23.601235Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9635e42a8ef64a5d83ef66181585a3270b99e1c8a5135d482d8d5605719ddc9

Aliases

arxiv: 1309.7543 · arxiv_version: 1309.7543v2 · doi: 10.48550/arxiv.1309.7543 · pith_short_12: VFRV4QVI55SK · pith_short_16: VFRV4QVI55SKLWB6 · pith_short_8: VFRV4QVI

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/VFRV4QVI55SKLWB66ZQYCWC2GJ \
  | 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: a9635e42a8ef64a5d83ef66181585a3270b99e1c8a5135d482d8d5605719ddc9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb914e8a85796721509b6ba011fe598bb50c8c9839aaf9bf6689e292410b2e04",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-09-29T06:44:59Z",
    "title_canon_sha256": "c48266a53be706f223349b5ade1401ab874b7ad2377b54989537efb2cb651c2e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.7543",
    "kind": "arxiv",
    "version": 2
  }
}