Pith Number

pith:AILEIXEL

pith:2009:AILEIXELPVYBEGQC3GQKWYUZ6Q

not attested not anchored not stored refs pending

Babinet's principle in the Fresnel regime studied using ultrasound

Akira Hitachi, Momo Takata

arxiv:0904.1269 v2 · 2009-04-08 · physics.class-ph · physics.ed-ph · 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{AILEIXELPVYBEGQC3GQKWYUZ6Q}

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	2026-05-18T02:14:06.963905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0216445c8b7d70121a02d9a0ab6299f4364bb945322053da4b056ecef5fdb0e4

Aliases

arxiv: 0904.1269 · arxiv_version: 0904.1269v2 · doi: 10.48550/arxiv.0904.1269 · pith_short_12: AILEIXELPVYB · pith_short_16: AILEIXELPVYBEGQC · pith_short_8: AILEIXEL

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/AILEIXELPVYBEGQC3GQKWYUZ6Q \
  | 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: 0216445c8b7d70121a02d9a0ab6299f4364bb945322053da4b056ecef5fdb0e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a49f9ef4e61f7c660deb67861ca7b24c73940e072880098f0e5e07851fb32069",
    "cross_cats_sorted": [
      "physics.ed-ph",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2009-04-08T06:45:38Z",
    "title_canon_sha256": "d9dbb59e0cba6dcb251b1f34ee5d79b9f0edc71f3334affde40a1d09f3f927c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1269",
    "kind": "arxiv",
    "version": 2
  }
}