Pith Number

pith:4EX67QQL

pith:2011:4EX67QQLJPB5KPA7DTDQMTDBCK

not attested not anchored not stored refs pending

Metamaterial-Enhanced Coupling between Magnetic Dipoles for Efficient Wireless Power Transfer

David R. Smith, Yaroslav Urzhumov

arxiv:1102.2281 v2 · 2011-02-11 · physics.class-ph · 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{4EX67QQLJPB5KPA7DTDQMTDBCK}

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	2026-05-18T04:17:04.376893Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e12fefc20b4bc3d53c1f1cc7064c61129baa69fc6ac09644b92922b445e87067

Aliases

arxiv: 1102.2281 · arxiv_version: 1102.2281v2 · doi: 10.48550/arxiv.1102.2281 · pith_short_12: 4EX67QQLJPB5 · pith_short_16: 4EX67QQLJPB5KPA7 · pith_short_8: 4EX67QQL

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/4EX67QQLJPB5KPA7DTDQMTDBCK \
  | 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: e12fefc20b4bc3d53c1f1cc7064c61129baa69fc6ac09644b92922b445e87067

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "acb63f682a008731f1620f2788461ee0702e9d490c57110218d7133a0b53cebc",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2011-02-11T04:46:08Z",
    "title_canon_sha256": "5630e19a86585859847b751c3a3b843511107b19dc409cb1e0368076bda8e0d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.2281",
    "kind": "arxiv",
    "version": 2
  }
}