Pith Number

pith:KCFU3JOK

pith:2009:KCFU3JOKWK3QAPFASF33VZCP4A

not attested not anchored not stored refs pending

A Fresh Look at Coding for q-ary Symmetric Channels

Claudio Weidmann, Gottfried Lechner

arxiv:0909.2009 v2 · 2009-09-10 · 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{KCFU3JOKWK3QAPFASF33VZCP4A}

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	2026-05-18T02:24:47.217915Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

508b4da5cab2b7003ca09177bae44fe007a4d1da717d148a2946d4c394609e5b

Aliases

arxiv: 0909.2009 · arxiv_version: 0909.2009v2 · doi: 10.48550/arxiv.0909.2009 · pith_short_12: KCFU3JOKWK3Q · pith_short_16: KCFU3JOKWK3QAPFA · pith_short_8: KCFU3JOK

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/KCFU3JOKWK3QAPFASF33VZCP4A \
  | 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: 508b4da5cab2b7003ca09177bae44fe007a4d1da717d148a2946d4c394609e5b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ca0bac55416b2337fef8f775e1ba50b8cf71ff87969f01a356e62224ab4d75b",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-09-10T18:17:30Z",
    "title_canon_sha256": "0a0a6e08f9030e8348b70b311378e02fbdeddf27654a76812f0ad471ca586c05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2009",
    "kind": "arxiv",
    "version": 2
  }
}