Pith Number

pith:EGN42W4A

pith:2015:EGN42W4AAQLSXJ4KA4PYN3RIXY

not attested not anchored not stored refs pending

On the Error Performance of Systematic Polar Codes

Liping Li, Wenyi Zhang, Yanjun Hu

arxiv:1504.04133 v1 · 2015-04-16 · 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{EGN42W4AAQLSXJ4KA4PYN3RIXY}

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	2026-05-18T02:18:39.726395Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

219bcd5b8004172ba78a071f86ee28be1453ec604ad987eb29acdfeca29deee2

Aliases

arxiv: 1504.04133 · arxiv_version: 1504.04133v1 · doi: 10.48550/arxiv.1504.04133 · pith_short_12: EGN42W4AAQLS · pith_short_16: EGN42W4AAQLSXJ4K · pith_short_8: EGN42W4A

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/EGN42W4AAQLSXJ4KA4PYN3RIXY \
  | 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: 219bcd5b8004172ba78a071f86ee28be1453ec604ad987eb29acdfeca29deee2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94c1d8a1420021de883b3768f7f97876c8d2ef106d21d0979b8a934606ea2b70",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-04-16T08:26:55Z",
    "title_canon_sha256": "1e034ca1c31bc2e7994332a8a2cc0ef256096c7596dd21c5c46d49e3e77569d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.04133",
    "kind": "arxiv",
    "version": 1
  }
}