Pith Number

pith:25JM7EQE

pith:2011:25JM7EQEFMSEPARLRVSFBUSLND

not attested not anchored not stored refs pending

Flat-face approximations of invisibility cloaks with planar metamaterial layers

Christoffer Elsen, David Smith, Marco Rahm, Oliver Paul, Yaroslav Urzhumov

arxiv:1110.5604 v1 · 2011-10-25 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{25JM7EQEFMSEPARLRVSFBUSLND}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:10:22.524999Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d752cf92042b2447822b8d6450d24b68e96bbfb88acc24ddea1de70bd0d85f7c

Aliases

arxiv: 1110.5604 · arxiv_version: 1110.5604v1 · doi: 10.48550/arxiv.1110.5604 · pith_short_12: 25JM7EQEFMSE · pith_short_16: 25JM7EQEFMSEPARL · pith_short_8: 25JM7EQE

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/25JM7EQEFMSEPARLRVSFBUSLND \
  | 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: d752cf92042b2447822b8d6450d24b68e96bbfb88acc24ddea1de70bd0d85f7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e46c9e99c733b013a8503670d509152c3c88a50fc4f4bd588516e717c161d526",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2011-10-25T18:30:18Z",
    "title_canon_sha256": "d4c14226cecff7a73a8ea022d2748e4c048bb59c28b85c892f6b9033a13ec30f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.5604",
    "kind": "arxiv",
    "version": 1
  }
}