Pith Number

pith:OZSUGBG2

pith:2013:OZSUGBG2S6NYFU7BHB2M5KDBKX

not attested not anchored not stored refs pending

A Hybrid ARQ Scheme Based on Polar Codes

Jiaru Lin, Kai Chen, Kai Niu

arxiv:1307.2800 v1 · 2013-07-10 · 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{OZSUGBG2S6NYFU7BHB2M5KDBKX}

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	2026-05-18T00:58:42.187855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76654304da979b82d3e13874cea86155c78edf33b004e83358b491d07bd3c1ed

Aliases

arxiv: 1307.2800 · arxiv_version: 1307.2800v1 · doi: 10.48550/arxiv.1307.2800 · pith_short_12: OZSUGBG2S6NY · pith_short_16: OZSUGBG2S6NYFU7B · pith_short_8: OZSUGBG2

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/OZSUGBG2S6NYFU7BHB2M5KDBKX \
  | 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: 76654304da979b82d3e13874cea86155c78edf33b004e83358b491d07bd3c1ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "edca5af2ce676c84e4c7a3f7af07e1f5420f65e979fead7f77727805965242f0",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-07-10T14:11:33Z",
    "title_canon_sha256": "a7b63b13d94a9888e6319b2f56b4ff216bb8eb3f144732aa01a045a9c2c87de7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2800",
    "kind": "arxiv",
    "version": 1
  }
}