Pith Number

pith:3ASQKI5V

pith:2009:3ASQKI5VXR2CXVN2MVUKTTCDN7

not attested not anchored not stored refs pending

Acoustic transmission enhancement through a periodically-structured stiff plate without any opening

Chunyin Qiu, Feiyan Cai, Han Jia, Manzhu Ke, Pai Peng, Shasha Peng, Xuefei Mei, Zhaojian He, Zhengyou Liu

arxiv:0912.4096 v2 · 2009-12-21 · 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{3ASQKI5VXR2CXVN2MVUKTTCDN7}

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	2026-05-18T04:23:46.562035Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8250523b5bc742bd5ba6568a9cc436fd9f4670ebea891c559b61c84854c1028

Aliases

arxiv: 0912.4096 · arxiv_version: 0912.4096v2 · doi: 10.48550/arxiv.0912.4096 · pith_short_12: 3ASQKI5VXR2C · pith_short_16: 3ASQKI5VXR2CXVN2 · pith_short_8: 3ASQKI5V

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/3ASQKI5VXR2CXVN2MVUKTTCDN7 \
  | 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: d8250523b5bc742bd5ba6568a9cc436fd9f4670ebea891c559b61c84854c1028

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f27f788b5aa9421425ab9715c902bbc4a23e9afea39a6dfd079a8a5a68193542",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2009-12-21T08:27:28Z",
    "title_canon_sha256": "25915ec729c221094c0f6615569f79b051f4ca857349aa23258af26fe9825a4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4096",
    "kind": "arxiv",
    "version": 2
  }
}