Pith Number

pith:PZWKIVXM

pith:2012:PZWKIVXMNG75IJPUMC5KPDDIVB

not attested not anchored not stored refs pending

Experimental demonstration of a broadband array of invisibility cloaks in the visible frequency range

H. K. Ermer, I. I. Smolyaninov, V. N. Smolyaninova

arxiv:1204.2319 v1 · 2012-04-11 · physics.optics

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

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	2026-05-18T01:57:53.758356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e6ca456ec69bfd425f460baa78c68a848af1edb603a755d9b3126c7ad2028f4

Aliases

arxiv: 1204.2319 · arxiv_version: 1204.2319v1 · doi: 10.48550/arxiv.1204.2319 · pith_short_12: PZWKIVXMNG75 · pith_short_16: PZWKIVXMNG75IJPU · pith_short_8: PZWKIVXM

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/PZWKIVXMNG75IJPUMC5KPDDIVB \
  | 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: 7e6ca456ec69bfd425f460baa78c68a848af1edb603a755d9b3126c7ad2028f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7649d347a73c5356479d4ec73c2dc44e287a69aa0df1a276f7ac0d5c8f14e43",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2012-04-11T02:16:51Z",
    "title_canon_sha256": "69db9df8af324082763fbba977d04f6e8eb5922117ff2339a3345d3b05de5f19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2319",
    "kind": "arxiv",
    "version": 1
  }
}