Pith Number

pith:P4NSWWBT

pith:2019:P4NSWWBTAG3AUT4CGLQW6LWMNU

not attested not anchored not stored refs pending

Spatially Coupled LDPC Codes and the Multiple Access Channel

Sebastian Cammerer, Stephan ten Brink, Xiaojie Wang, Yingyan Ma

arxiv:1901.05877 v2 · 2019-01-17 · 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{P4NSWWBTAG3AUT4CGLQW6LWMNU}

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	2026-05-17T23:55:26.813847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f1b2b583301b60a4f8232e16f2ecc6d0f3fa223b60657ef422f0739d140b287

Aliases

arxiv: 1901.05877 · arxiv_version: 1901.05877v2 · doi: 10.48550/arxiv.1901.05877 · pith_short_12: P4NSWWBTAG3A · pith_short_16: P4NSWWBTAG3AUT4C · pith_short_8: P4NSWWBT

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/P4NSWWBTAG3AUT4CGLQW6LWMNU \
  | 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: 7f1b2b583301b60a4f8232e16f2ecc6d0f3fa223b60657ef422f0739d140b287

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "def113a92858c6689e048d1f7d3842be991b010ab10e01aeb54a600eb5508ef9",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2019-01-17T16:32:21Z",
    "title_canon_sha256": "257e6278a37a25e174aa0cdf65c73aaf8c773b4a0013956f7770d24875c2ea73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.05877",
    "kind": "arxiv",
    "version": 2
  }
}