Pith Number

pith:KBJ4BRWY

pith:2017:KBJ4BRWYN4J5NBVVJ5SSF46EAK

not attested not anchored not stored refs pending

On the Construction of Polar Codes for Achieving the Capacity of Marginal Channels

Amirsina Torfi, Siamak Aram, Sobhan Soleymani, Vahid Tabataba Vakili

arxiv:1707.04512 v6 · 2017-07-12 · 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{KBJ4BRWYN4J5NBVVJ5SSF46EAK}

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	2026-05-18T00:25:28.952880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5053c0c6d86f13d686b54f6522f3c402aff550a1b051926de7edba5e19565c9a

Aliases

arxiv: 1707.04512 · arxiv_version: 1707.04512v6 · doi: 10.48550/arxiv.1707.04512 · pith_short_12: KBJ4BRWYN4J5 · pith_short_16: KBJ4BRWYN4J5NBVV · pith_short_8: KBJ4BRWY

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/KBJ4BRWYN4J5NBVVJ5SSF46EAK \
  | 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: 5053c0c6d86f13d686b54f6522f3c402aff550a1b051926de7edba5e19565c9a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f203ae0021f6e0bdba08fa915d4a564c47dfb47da872fd2d17d035a31f1c09d5",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2017-07-12T15:20:44Z",
    "title_canon_sha256": "50e61b5c25a88207d2e51734ae19aabcc359ff8fd51e05d583888d7e9937ea63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.04512",
    "kind": "arxiv",
    "version": 6
  }
}