Pith Number

pith:QHZ5CQPK

pith:2012:QHZ5CQPKQ5ANSMFVTHUD4FUR2L

not attested not anchored not stored refs pending

Invisibility cloak inside a Luneburg lens: Experimental demonstration of birefrigent transformation optics devices

A. Piazza, D. Schaefer, H. K. Ermer, I. I. Smolyaninov, V. N. Smolyaninova

arxiv:1208.3174 v2 · 2012-08-15 · 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{QHZ5CQPKQ5ANSMFVTHUD4FUR2L}

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	2026-05-18T03:34:35.383307Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81f3d141ea8740d930b599e83e1691d2dee50692912d18d1709cc6c344b328fd

Aliases

arxiv: 1208.3174 · arxiv_version: 1208.3174v2 · doi: 10.48550/arxiv.1208.3174 · pith_short_12: QHZ5CQPKQ5AN · pith_short_16: QHZ5CQPKQ5ANSMFV · pith_short_8: QHZ5CQPK

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/QHZ5CQPKQ5ANSMFVTHUD4FUR2L \
  | 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: 81f3d141ea8740d930b599e83e1691d2dee50692912d18d1709cc6c344b328fd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1e3618fe0a4c599316a3cf4c59af221fef8579ca142780840fd37691cd737d7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2012-08-15T18:38:41Z",
    "title_canon_sha256": "30c62d5fe6a8f835ea8027f1a7ecd65e22456347ccdb4fd92eaed84d429806d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.3174",
    "kind": "arxiv",
    "version": 2
  }
}