Pith Number

pith:DDAF3PPG

pith:2011:DDAF3PPGDH5LMGH3IQCMOLLG3G

not attested not anchored not stored refs pending

Coherent Optical DFT-Spread OFDM

Fanggang Wang, Xiaodong Wang

arxiv:1102.5641 v1 · 2011-02-28 · 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{DDAF3PPGDH5LMGH3IQCMOLLG3G}

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	2026-05-18T04:27:46.386865Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18c05dbde619fab618fb4404c72d66d99754130574d4c2ace4df4e4c9b67e78d

Aliases

arxiv: 1102.5641 · arxiv_version: 1102.5641v1 · doi: 10.48550/arxiv.1102.5641 · pith_short_12: DDAF3PPGDH5L · pith_short_16: DDAF3PPGDH5LMGH3 · pith_short_8: DDAF3PPG

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/DDAF3PPGDH5LMGH3IQCMOLLG3G \
  | 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: 18c05dbde619fab618fb4404c72d66d99754130574d4c2ace4df4e4c9b67e78d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f988f96b1b1a64efbbd8bf1b1c471b0061c00bd153c3316efa2b30bba5ee107c",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-02-28T11:56:20Z",
    "title_canon_sha256": "b8f2478b9c4e4062384d7fc663437b8446531aeb6cc7dcfcabc76f6173f29e50"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.5641",
    "kind": "arxiv",
    "version": 1
  }
}