Pith Number

pith:GI5R4FYS

pith:2009:GI5R4FYSSSWSVAQEIWBWLGBAWB

not attested not anchored not stored refs pending

Concatenated Coding for the AWGN Channel with Noisy Feedback

David J. Love, Zachary Chance

arxiv:0909.0105 v5 · 2009-09-01 · cs.IT · math.IT

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GI5R4FYSSSWSVAQEIWBWLGBAWB}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:28:10.055938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

323b1e171294ad2a82044583659820b05446b8f079ff9bb7f4bf1f4376d6216f

Aliases

arxiv: 0909.0105 · arxiv_version: 0909.0105v5 · doi: 10.48550/arxiv.0909.0105 · pith_short_12: GI5R4FYSSSWS · pith_short_16: GI5R4FYSSSWSVAQE · pith_short_8: GI5R4FYS

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/GI5R4FYSSSWSVAQEIWBWLGBAWB \
  | 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: 323b1e171294ad2a82044583659820b05446b8f079ff9bb7f4bf1f4376d6216f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a4b18c103d03c687d778f91a89a7f29bd8b9593a6cbecfa08fa2907874fa0ff",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-09-01T14:47:57Z",
    "title_canon_sha256": "c1a79b269b372320472a20c916d38b41cbfd8b722e31c4f64dec7712b8d712cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.0105",
    "kind": "arxiv",
    "version": 5
  }
}