Pith Number

pith:4NZUX75L

pith:2018:4NZUX75LVM5JITZFL6623GYDB2

not attested not anchored not stored refs pending

Bifocal-Lens Antenna Based OAM Communications System

Hailin Zhang, Shanghua Gao, Wei Zhang, Wenchi Cheng

arxiv:1809.04845 v1 · 2018-09-13 · 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{4NZUX75LVM5JITZFL6623GYDB2}

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	2026-05-18T00:05:47.349414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3734bffabab3a944f255fbdad9b030eb327447349196d3e4bf931fe1fe9dda8

Aliases

arxiv: 1809.04845 · arxiv_version: 1809.04845v1 · doi: 10.48550/arxiv.1809.04845 · pith_short_12: 4NZUX75LVM5J · pith_short_16: 4NZUX75LVM5JITZF · pith_short_8: 4NZUX75L

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/4NZUX75LVM5JITZFL6623GYDB2 \
  | 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: e3734bffabab3a944f255fbdad9b030eb327447349196d3e4bf931fe1fe9dda8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9b7305da9ec5eea63005311ef56db3bfacf4762a56f2f20eee28bd95157508e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2018-09-13T09:12:03Z",
    "title_canon_sha256": "56f5de7e8046755cf6192c1b9a1a074277e9bd1c7ab726780e6180d829c61880"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.04845",
    "kind": "arxiv",
    "version": 1
  }
}