Pith Number

pith:7HZIGA5T

pith:2011:7HZIGA5TYXMXVIZBZDEHO3ECOG

not attested not anchored not stored refs pending

Spatially Coupled LDPC Codes for Decode-and-Forward in Erasure Relay Channel

Hironori Uchikawa, Kenta Kasai, Kohichi Sakaniwa

arxiv:1102.5087 v2 · 2011-02-24 · 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{7HZIGA5TYXMXVIZBZDEHO3ECOG}

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	2026-05-18T02:03:05.260541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9f28303b3c5d97aa321c8c8776c8271830ac8692b0928049db4f6be5905ce8c

Aliases

arxiv: 1102.5087 · arxiv_version: 1102.5087v2 · doi: 10.48550/arxiv.1102.5087 · pith_short_12: 7HZIGA5TYXMX · pith_short_16: 7HZIGA5TYXMXVIZB · pith_short_8: 7HZIGA5T

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/7HZIGA5TYXMXVIZBZDEHO3ECOG \
  | 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: f9f28303b3c5d97aa321c8c8776c8271830ac8692b0928049db4f6be5905ce8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1fbf169c58dab735b6bbeab2e5145c7f6ab7f1ed0581e11e339316f3738fb98d",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-02-24T20:58:43Z",
    "title_canon_sha256": "64bc4b4d7070620dd5c4bcd84621dcef13d8e3d462416b7d492fe9208c0a15f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.5087",
    "kind": "arxiv",
    "version": 2
  }
}