Pith Number

pith:WQW7BIOZ

pith:2013:WQW7BIOZEVWJHTP4PSCTR3ICL7

not attested not anchored not stored refs pending

Compound Polar Codes

Hessam Mahdavifar, Inyup Kang, Jungwon Lee, Mostafa El-Khamy

arxiv:1302.0265 v1 · 2013-02-01 · 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{WQW7BIOZEVWJHTP4PSCTR3ICL7}

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	2026-05-18T03:34:46.913542Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b42df0a1d9256c93cdfc7c8538ed025fd886420c1c24a826770b0113e1d78ce7

Aliases

arxiv: 1302.0265 · arxiv_version: 1302.0265v1 · doi: 10.48550/arxiv.1302.0265 · pith_short_12: WQW7BIOZEVWJ · pith_short_16: WQW7BIOZEVWJHTP4 · pith_short_8: WQW7BIOZ

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/WQW7BIOZEVWJHTP4PSCTR3ICL7 \
  | 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: b42df0a1d9256c93cdfc7c8538ed025fd886420c1c24a826770b0113e1d78ce7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cdab23aa63b504a9063633b4288962abd203d7a6335eaab87dff41635c597041",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-02-01T20:05:36Z",
    "title_canon_sha256": "821c32de036b50e3b5a9332980fbd5b95490089a9f4e508eb0100825593b6679"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.0265",
    "kind": "arxiv",
    "version": 1
  }
}