Pith Number

pith:QPCTDVB3

pith:2010:QPCTDVB32DA6YRJHZWBIZ5QDTY

not attested not anchored not stored refs pending

PPM demodulation: On approaching fundamental limits of optical communications

Jonathan L. Habif, Masahiro Takeoka, Saikat Guha

arxiv:1001.2447 v2 · 2010-01-14 · quant-ph · 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{QPCTDVB32DA6YRJHZWBIZ5QDTY}

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	2026-05-18T04:26:31.856548Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83c531d43bd0c1ec4527cd828cf6039e2e3116ac85508a0ab99d9f88faa5a7a9

Aliases

arxiv: 1001.2447 · arxiv_version: 1001.2447v2 · doi: 10.48550/arxiv.1001.2447 · pith_short_12: QPCTDVB32DA6 · pith_short_16: QPCTDVB32DA6YRJH · pith_short_8: QPCTDVB3

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/QPCTDVB32DA6YRJHZWBIZ5QDTY \
  | 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: 83c531d43bd0c1ec4527cd828cf6039e2e3116ac85508a0ab99d9f88faa5a7a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9bbd742342565dfe2994de151de36f0d6135a6f4145fb75175ad9190224d29bc",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2010-01-14T12:58:07Z",
    "title_canon_sha256": "cf8b95e8f40aac9ebeacf2b91f291347a14b89fb2a31016e9a93246519599f7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.2447",
    "kind": "arxiv",
    "version": 2
  }
}