Pith Number

pith:HMJ4PK7P

pith:2017:HMJ4PK7PPNSAENKFK7MUKXPWID

not attested not anchored not stored refs pending

Ultrathin ultralight acoustic cloak

Igor I. Smolyaninov, Vera N. Smolyaninova

arxiv:1702.05405 v2 · 2017-02-04 · physics.class-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{HMJ4PK7PPNSAENKFK7MUKXPWID}

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	2026-05-18T00:39:06.798544Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b13c7abef7b6402354557d9455df640fffa5aa79f07d91c26e9413a2a7f87cb

Aliases

arxiv: 1702.05405 · arxiv_version: 1702.05405v2 · doi: 10.48550/arxiv.1702.05405 · pith_short_12: HMJ4PK7PPNSA · pith_short_16: HMJ4PK7PPNSAENKF · pith_short_8: HMJ4PK7P

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/HMJ4PK7PPNSAENKFK7MUKXPWID \
  | 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: 3b13c7abef7b6402354557d9455df640fffa5aa79f07d91c26e9413a2a7f87cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6dbcf83675ea43085807034c521836403b04774ee2af7a734982f7088f4f1cc2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2017-02-04T17:23:14Z",
    "title_canon_sha256": "66638b2493d9f73362da38060ce9cf9e81261d9d4cef2f4a3289e3ec111a6bf7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.05405",
    "kind": "arxiv",
    "version": 2
  }
}