Pith Number

pith:QLTAOKHZ

pith:2009:QLTAOKHZJ7SXCT3JV5GYG3EEWV

not attested not anchored not stored refs pending

Cloaking a metal object from an electromagnetic pulse: A comparison between various cloaking techniques

Henrik Kettunen, Pekka Alitalo, Sergei Tretyakov

arxiv:0912.3617 v1 · 2009-12-18 · 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{QLTAOKHZJ7SXCT3JV5GYG3EEWV}

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	2026-05-18T02:10:15.683485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82e60728f94fe5714f69af4d836c84b55553edbb2ffcad4650b35f9bef1c6a11

Aliases

arxiv: 0912.3617 · arxiv_version: 0912.3617v1 · doi: 10.48550/arxiv.0912.3617 · pith_short_12: QLTAOKHZJ7SX · pith_short_16: QLTAOKHZJ7SXCT3J · pith_short_8: QLTAOKHZ

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/QLTAOKHZJ7SXCT3JV5GYG3EEWV \
  | 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: 82e60728f94fe5714f69af4d836c84b55553edbb2ffcad4650b35f9bef1c6a11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f3e932670a0eb7cdcced9fa2031190bfb159705eb616603d668fd65a9a8ccfef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2009-12-18T09:29:28Z",
    "title_canon_sha256": "8b9f3737d89ca9df6605d22ecedf1d67e32015db30b8a1033b909556ab9eace4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.3617",
    "kind": "arxiv",
    "version": 1
  }
}