Pith Number

pith:W5DBLUUK

pith:2010:W5DBLUUKKLE626VTYMQLZK33ZX

not attested not anchored not stored refs pending

Negative index of refraction, perfect lenses and transformation optics -- some words of caution

Alberto Favaro, Luzi Bergamin

arxiv:1001.4655 v1 · 2010-01-26 · 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{W5DBLUUKKLE626VTYMQLZK33ZX}

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	2026-05-18T04:30:14.568555Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b74615d28a52c9ed7ab3c320bcab7bcdeccf63d87df27a0daaa01f6c2475d850

Aliases

arxiv: 1001.4655 · arxiv_version: 1001.4655v1 · doi: 10.48550/arxiv.1001.4655 · pith_short_12: W5DBLUUKKLE6 · pith_short_16: W5DBLUUKKLE626VT · pith_short_8: W5DBLUUK

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/W5DBLUUKKLE626VTYMQLZK33ZX \
  | 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: b74615d28a52c9ed7ab3c320bcab7bcdeccf63d87df27a0daaa01f6c2475d850

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c130a94ede08849af3135b685d5a761615b4ee696656078eef19f2c25886ec7f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2010-01-26T11:18:49Z",
    "title_canon_sha256": "ea378f49154e1c5d8588b95c9e54f1e6eb53c18edb45df96c47fd2a5966d4e6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.4655",
    "kind": "arxiv",
    "version": 1
  }
}