Pith Number

pith:4SVQ6OFR

pith:2018:4SVQ6OFRYIFODFGWQS3TE7NWMY

not attested not anchored not stored refs pending

The Inverse Grating Problem: Efficient Design of Anomalous Flexural Wave Reflectors and Refractors

Andrew N. Norris, Daniel Torrent, Pawel Packo

arxiv:1809.01343 v2 · 2018-09-05 · physics.app-ph · 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{4SVQ6OFRYIFODFGWQS3TE7NWMY}

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	2026-05-17T23:56:18.022600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4ab0f38b1c20ae194d684b7327db66614194f4fd25f193cb8857d99c68a2035

Aliases

arxiv: 1809.01343 · arxiv_version: 1809.01343v2 · doi: 10.48550/arxiv.1809.01343 · pith_short_12: 4SVQ6OFRYIFO · pith_short_16: 4SVQ6OFRYIFODFGW · pith_short_8: 4SVQ6OFR

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/4SVQ6OFRYIFODFGWQS3TE7NWMY \
  | 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: e4ab0f38b1c20ae194d684b7327db66614194f4fd25f193cb8857d99c68a2035

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37ff69e4b1ce9e276774b63ed25f3f21a62094b39102688fb3ab7de939d1a63b",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2018-09-05T06:15:45Z",
    "title_canon_sha256": "9893f9828c8d698a0d47a985c4c6835eeb28b8f003ed9583051250d934da4497"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.01343",
    "kind": "arxiv",
    "version": 2
  }
}