Pith Number

pith:D3XQ3ZWK

pith:2019:D3XQ3ZWKWN5IROLC3LDEUBJD7Y

not attested not anchored not stored refs pending

A General Construction and Encoder Implementation of Polar Codes

Chuan Zhang, Kai Niu, Liping Li, Wei Song, Yifei Shen

arxiv:1903.02899 v2 · 2019-03-07 · 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{D3XQ3ZWKWN5IROLC3LDEUBJD7Y}

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	2026-07-05T00:13:42.851796Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1eef0de6cab37a88b962dac64a0523fe277e1435c246dedff4f147262a3be38c

Aliases

arxiv: 1903.02899 · arxiv_version: 1903.02899v2 · doi: 10.48550/arxiv.1903.02899 · pith_short_12: D3XQ3ZWKWN5I · pith_short_16: D3XQ3ZWKWN5IROLC · pith_short_8: D3XQ3ZWK

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/D3XQ3ZWKWN5IROLC3LDEUBJD7Y \
  | 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: 1eef0de6cab37a88b962dac64a0523fe277e1435c246dedff4f147262a3be38c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8afe34deb46c83639aa9cb73f9682e20043178a7c5940cec913c1d09a2d5339d",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2019-03-07T13:29:16Z",
    "title_canon_sha256": "2281fdd6b95d586c0addd6d95392859279bd3b1f35e3ff0bcc89393e09d82dbc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.02899",
    "kind": "arxiv",
    "version": 2
  }
}