Pith Number

pith:CNN3442G

pith:2009:CNN3442GUPQMOXTWARZXWGD3RH

not attested not anchored not stored refs pending

Layered superconductors as negative-refractive-index metamaterials

A.L. Rakhmanov, Federico Capasso, Franco Nori, J.A. Fan, V.A. Yampol'skii

arxiv:0907.3564 v2 · 2009-07-21 · cond-mat.supr-con

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CNN3442GUPQMOXTWARZXWGD3RH}

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	2026-05-18T03:30:42.718224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

135bbe7346a3e0c75e7604737b187b89da53b50357995c6d345fd542f4258824

Aliases

arxiv: 0907.3564 · arxiv_version: 0907.3564v2 · doi: 10.48550/arxiv.0907.3564 · pith_short_12: CNN3442GUPQM · pith_short_16: CNN3442GUPQMOXTW · pith_short_8: CNN3442G

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/CNN3442GUPQMOXTWARZXWGD3RH \
  | 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: 135bbe7346a3e0c75e7604737b187b89da53b50357995c6d345fd542f4258824

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eae1b49dbc58836e5d2918ae12113b42c75e3c484f1105eebb2764c793d14877",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.supr-con",
    "submitted_at": "2009-07-21T07:44:45Z",
    "title_canon_sha256": "36f333efdcf56c57191d4cc407a47da0a6579a8df509572ac34ca8248e7d92f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3564",
    "kind": "arxiv",
    "version": 2
  }
}