Pith Number

pith:TWNYTIZD

pith:2013:TWNYTIZD7JURPPRIM7RHYSH6LG

not attested not anchored not stored refs pending

On the Construction and Decoding of Concatenated Polar Codes

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

arxiv:1301.7491 v1 · 2013-01-31 · 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{TWNYTIZD7JURPPRIM7RHYSH6LG}

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	2026-05-18T03:34:49.388721Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d9b89a323fa6917be2867e27c48fe598244fb92a9b7c9cbebe3298dcaa421f6

Aliases

arxiv: 1301.7491 · arxiv_version: 1301.7491v1 · doi: 10.48550/arxiv.1301.7491 · pith_short_12: TWNYTIZD7JUR · pith_short_16: TWNYTIZD7JURPPRI · pith_short_8: TWNYTIZD

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/TWNYTIZD7JURPPRIM7RHYSH6LG \
  | 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: 9d9b89a323fa6917be2867e27c48fe598244fb92a9b7c9cbebe3298dcaa421f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90f4029235ea016d8afe8c92b94c5ac14acb8abb847b7405b6771e780408ac5f",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-01-31T02:14:02Z",
    "title_canon_sha256": "4df493c40bea7bb37df13aaf3d20da728aaa9701b3c6eae5151b0f95e5e35ab3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.7491",
    "kind": "arxiv",
    "version": 1
  }
}