Pith Number

pith:SJGTWUWW

pith:2005:SJGTWUWW3UUKBKTFCXAPP2DEQE

not attested not anchored not stored refs pending

An Ultrasonic analog for a laser

Alexey Yamilov, Oleg I Lobkis, Richard L Weaver

arxiv:physics/0509215 v2 · 2005-09-26 · 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{SJGTWUWW3UUKBKTFCXAPP2DEQE}

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	2026-05-18T00:36:52.473137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

924d3b52d6dd28a0aa6515c0f7e864810313011895641f4cfb169c15d8cf5fac

Aliases

arxiv: physics/0509215 · arxiv_version: physics/0509215v2 · doi: 10.48550/arxiv.physics/0509215 · pith_short_12: SJGTWUWW3UUK · pith_short_16: SJGTWUWW3UUKBKTF · pith_short_8: SJGTWUWW

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/SJGTWUWW3UUKBKTFCXAPP2DEQE \
  | 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: 924d3b52d6dd28a0aa6515c0f7e864810313011895641f4cfb169c15d8cf5fac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20af889e6166420d96bebc7433d968858c5ff02f6464073890e73b8e43907c1c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2005-09-26T16:31:59Z",
    "title_canon_sha256": "3e1248f068e0fb8875efa3c78ac010c11e42d8b9e3a052c7bc804291ee0fc5ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0509215",
    "kind": "arxiv",
    "version": 2
  }
}