Pith Number

pith:HT4CJB7U

pith:2023:HT4CJB7UYWNJP6YTQ2NW5ETQ7P

not attested not anchored not stored refs pending

Level set methods for gradient-free optimization of metasurface arrays

Alex Saad-Falcon, Christopher Howard, Justin Romberg, Kenneth Allen

arxiv:2307.07606 v1 · 2023-07-14 · physics.app-ph · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HT4CJB7UYWNJP6YTQ2NW5ETQ7P}

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	2026-07-05T06:30:59.773612Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3cf82487f4c59a97fb13869b6e9270fbe554da6a96303c6bfd115847db1c97ea

Aliases

arxiv: 2307.07606 · arxiv_version: 2307.07606v1 · doi: 10.48550/arxiv.2307.07606 · pith_short_12: HT4CJB7UYWNJ · pith_short_16: HT4CJB7UYWNJP6YT · pith_short_8: HT4CJB7U

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/HT4CJB7UYWNJP6YTQ2NW5ETQ7P \
  | 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: 3cf82487f4c59a97fb13869b6e9270fbe554da6a96303c6bfd115847db1c97ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87276149a46bd254d2373795d119f205429b5b39ada9db94edf689719570340a",
    "cross_cats_sorted": [
      "eess.SP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2023-07-14T20:04:02Z",
    "title_canon_sha256": "2f9edaf33de892af77f43a20d28ef0004704f2b56013dec165a42281a3216da7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2307.07606",
    "kind": "arxiv",
    "version": 1
  }
}