Pith Number

pith:G4IW7YZI

pith:2014:G4IW7YZIS3MYUI5ZDATWOR6K2S

not attested not anchored not stored refs pending

Improving soft FEC performance for higher-order modulations via optimized bit channel mappings

Alex Alvarado, Alexandre Graell i Amat, Christian H\"ager, Erik Agrell, Fredrik Br\"annstr\"om

arxiv:1404.2269 v2 · 2014-04-08 · cs.IT · math.IT · physics.optics

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{G4IW7YZIS3MYUI5ZDATWOR6K2S}

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	2026-05-18T02:49:53.497425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37116fe32896d98a23b918276747cad4bc8464691de36a8c018f4e5cde20357b

Aliases

arxiv: 1404.2269 · arxiv_version: 1404.2269v2 · doi: 10.48550/arxiv.1404.2269 · pith_short_12: G4IW7YZIS3MY · pith_short_16: G4IW7YZIS3MYUI5Z · pith_short_8: G4IW7YZI

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/G4IW7YZIS3MYUI5ZDATWOR6K2S \
  | 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: 37116fe32896d98a23b918276747cad4bc8464691de36a8c018f4e5cde20357b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dea3bcdbe8c7b6349711d1ddea0e59d7c0e1561424f6f1fae99144d7eccff39f",
    "cross_cats_sorted": [
      "math.IT",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-04-08T15:15:43Z",
    "title_canon_sha256": "473bf09190703c13043666022e81d89d86d91f1b4162660139c80f77dbeda016"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.2269",
    "kind": "arxiv",
    "version": 2
  }
}