Pith Number

pith:HBKZO7BZ

pith:2021:HBKZO7BZUCC4FUHW5O7TJRQSAA

not attested not anchored not stored refs pending

An Overview of Signal Processing Techniques for RIS/IRS-aided Wireless Systems

A. Lee Swindlehurst, Angela Yingjun Zhang, Cunhua Pan, Gui Zhou, Hong Ren, Kangda Zhi, Marco Di Renzo, Rui Zhang, Sheng Hong, Tuo Wu, Yijin Pan

arxiv:2112.05989 v2 · 2021-12-11 · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HBKZO7BZUCC4FUHW5O7TJRQSAA}

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	2026-07-05T04:57:02.326963Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3855977c39a085c2d0f6ebbf34c612000c12da4178a9e20e8002fd799a4d13de

Aliases

arxiv: 2112.05989 · arxiv_version: 2112.05989v2 · doi: 10.48550/arxiv.2112.05989 · pith_short_12: HBKZO7BZUCC4 · pith_short_16: HBKZO7BZUCC4FUHW · pith_short_8: HBKZO7BZ

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/HBKZO7BZUCC4FUHW5O7TJRQSAA \
  | 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: 3855977c39a085c2d0f6ebbf34c612000c12da4178a9e20e8002fd799a4d13de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad9111f2bbf69ae2d22c2e0c8a319b3a1fe4121a139ac0ea1c37d7df3ae05d50",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2021-12-11T14:01:50Z",
    "title_canon_sha256": "f30e28d6d42077abd56212c450f93aa89a7b6305e4874bfeaa32b113d21269f8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.05989",
    "kind": "arxiv",
    "version": 2
  }
}