Pith Number

pith:Q4M6IY5G

pith:2010:Q4M6IY5GUZOU3B57HXIUNQMPHW

not attested not anchored not stored refs pending

Achieving the Secrecy Capacity of Wiretap Channels Using Polar Codes

Alexander Vardy, Hessam Mahdavifar

arxiv:1007.3568 v2 · 2010-07-21 · cs.IT · cs.CR · 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{Q4M6IY5GUZOU3B57HXIUNQMPHW}

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	2026-05-18T04:11:41.786869Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8719e463a6a65d4d87bf3dd146c18f3d936e69e2ef03401739343942c6fd6cf0

Aliases

arxiv: 1007.3568 · arxiv_version: 1007.3568v2 · doi: 10.48550/arxiv.1007.3568 · pith_short_12: Q4M6IY5GUZOU · pith_short_16: Q4M6IY5GUZOU3B57 · pith_short_8: Q4M6IY5G

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/Q4M6IY5GUZOU3B57HXIUNQMPHW \
  | 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: 8719e463a6a65d4d87bf3dd146c18f3d936e69e2ef03401739343942c6fd6cf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b51edabb980b43712fc39e8343a2f59b6556809b7f0a46bec48e5c9ac25d9541",
    "cross_cats_sorted": [
      "cs.CR",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2010-07-21T06:49:42Z",
    "title_canon_sha256": "6f8a1f55b355d01e544fc3892d4e45d84f12ccc7b092aba7fa453b012b449d71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.3568",
    "kind": "arxiv",
    "version": 2
  }
}