Pith Number

pith:AZ2OOU2N

pith:2020:AZ2OOU2NSVEDEGE6FQIV4PPBM3

not attested not anchored not stored refs pending

Inverse design of photonic crystals through automatic differentiation

Alex Y. Song, Beicheng Lou, Dario Gerace, Ian A. D. Williamson, Lucio C. Andreani, Momchil Minkov, Shanhui Fan, Tyler W. Hughes

arxiv:2003.00379 v1 · 2020-03-01 · physics.optics · cs.CE · physics.app-ph · physics.comp-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AZ2OOU2NSVEDEGE6FQIV4PPBM3}

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	2026-07-05T01:34:42.252483Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0674e7534d954832189e2c115e3de166da36160db06450029e6379eed5388797

Aliases

arxiv: 2003.00379 · arxiv_version: 2003.00379v1 · doi: 10.48550/arxiv.2003.00379 · pith_short_12: AZ2OOU2NSVED · pith_short_16: AZ2OOU2NSVEDEGE6 · pith_short_8: AZ2OOU2N

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/AZ2OOU2NSVEDEGE6FQIV4PPBM3 \
  | 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: 0674e7534d954832189e2c115e3de166da36160db06450029e6379eed5388797

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f49186d941e6adc4c68a0d2a7abdab463b768608f06f720e8f656ce18fbe555e",
    "cross_cats_sorted": [
      "cs.CE",
      "physics.app-ph",
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2020-03-01T02:11:21Z",
    "title_canon_sha256": "18cf15d3da1a95d91b4ff02699d8bd5aaf86f092ad428bffac2c27d4dc203fce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.00379",
    "kind": "arxiv",
    "version": 1
  }
}