Pith Number

pith:QTDXU6M7

pith:2018:QTDXU6M7ZX6JDGL4SF26TK2P4V

not attested not anchored not stored refs pending

Designing scattering-free isotropic index profiles using phase-amplitude equations

Chris King, Simon Horsley, Thomas Philbin

arxiv:1802.02236 v2 · 2018-02-06 · 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{QTDXU6M7ZX6JDGL4SF26TK2P4V}

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	2026-05-18T00:15:16.325756Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84c77a799fcdfc91997c9175e9ab4fe5486f8b4b83ed17956200047e4d2adb68

Aliases

arxiv: 1802.02236 · arxiv_version: 1802.02236v2 · doi: 10.48550/arxiv.1802.02236 · pith_short_12: QTDXU6M7ZX6J · pith_short_16: QTDXU6M7ZX6JDGL4 · pith_short_8: QTDXU6M7

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/QTDXU6M7ZX6JDGL4SF26TK2P4V \
  | 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: 84c77a799fcdfc91997c9175e9ab4fe5486f8b4b83ed17956200047e4d2adb68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ef284bff8c1b6db25fdf9cfa5a21d876fb11b73e9c348a5674c7b08d9138901",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2018-02-06T21:54:21Z",
    "title_canon_sha256": "49bda9317520a27af519dacdd98a8b6e4e8e57562315d7fe316eaa972f371bf1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.02236",
    "kind": "arxiv",
    "version": 2
  }
}