Pith Number

pith:LD7KAAWP

pith:2019:LD7KAAWPYANJF7O3JONTTYSDEC

not attested not anchored not stored refs pending

Optimal Puncturing of Polar Codes With a Fixed Information Set

Kai Niu, Liping Li, Wei Song

arxiv:1903.06420 v1 · 2019-03-15 · 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{LD7KAAWPYANJF7O3JONTTYSDEC}

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	2026-05-17T23:51:10.892476Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

58fea002cfc01a92fddb4b9b39e243209e78a96f48886f810bd326217054406c

Aliases

arxiv: 1903.06420 · arxiv_version: 1903.06420v1 · doi: 10.48550/arxiv.1903.06420 · pith_short_12: LD7KAAWPYANJ · pith_short_16: LD7KAAWPYANJF7O3 · pith_short_8: LD7KAAWP

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/LD7KAAWPYANJF7O3JONTTYSDEC \
  | 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: 58fea002cfc01a92fddb4b9b39e243209e78a96f48886f810bd326217054406c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f3ae2940fc7397f1209c61de69052bad75d6703d4f7eb2a9ae41cf5719341504",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2019-03-15T09:21:33Z",
    "title_canon_sha256": "e822a203471055c3aa78ee90f8b0bf1808d7e33c9fc22041bac17ef29e530290"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.06420",
    "kind": "arxiv",
    "version": 1
  }
}