Pith Number

pith:QDYPFW7O

pith:2011:QDYPFW7OMGAHHAUDF6QZVE75K3

not attested not anchored not stored refs pending

Improvement of BP-Based CDMA Multiuser Detection by Spatial Coupling

Keigo Takeuchi, Toshiyuki Tanaka, Tsutomu Kawabata

arxiv:1102.3061 v3 · 2011-02-15 · 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{QDYPFW7OMGAHHAUDF6QZVE75K3}

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	2026-05-18T04:23:47.697933Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80f0f2dbee61807382832fa19a93fd56d78817657de5e6d6acafe2a855a27eec

Aliases

arxiv: 1102.3061 · arxiv_version: 1102.3061v3 · doi: 10.48550/arxiv.1102.3061 · pith_short_12: QDYPFW7OMGAH · pith_short_16: QDYPFW7OMGAHHAUD · pith_short_8: QDYPFW7O

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/QDYPFW7OMGAHHAUDF6QZVE75K3 \
  | 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: 80f0f2dbee61807382832fa19a93fd56d78817657de5e6d6acafe2a855a27eec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d6936b5700fb85b49b52252363a7fceec282204a496e198bc5cd018f15376c8",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-02-15T13:12:26Z",
    "title_canon_sha256": "d470cce41cb028b7202e173c522daa78e78fdd4f0a89f1bd0539d95fab3e4d31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.3061",
    "kind": "arxiv",
    "version": 3
  }
}