Pith Number

pith:7VTXRAUP

pith:2019:7VTXRAUPTJR5YMLPPNX6NMLK24

not attested not anchored not stored refs pending

Bending sound around sharp corners without using topological edge states

Cheng Zhang, Haolin Jiang, Jin Yang, Junchen Ke, Liting Wu, Mourad Oudich, Qiang Cheng, Tiejun Cui, Wenkang Cao, Yuanchen Deng, Yun Jing

arxiv:1903.05799 v1 · 2019-03-14 · physics.app-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{7VTXRAUPTJR5YMLPPNX6NMLK24}

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	2026-05-17T23:51:16.204052Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd6778828f9a63dc316f7b6fe6b16ad71c6f7175fdfff2b6c1c27f3c2c5ed789

Aliases

arxiv: 1903.05799 · arxiv_version: 1903.05799v1 · doi: 10.48550/arxiv.1903.05799 · pith_short_12: 7VTXRAUPTJR5 · pith_short_16: 7VTXRAUPTJR5YMLP · pith_short_8: 7VTXRAUP

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/7VTXRAUPTJR5YMLPPNX6NMLK24 \
  | 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: fd6778828f9a63dc316f7b6fe6b16ad71c6f7175fdfff2b6c1c27f3c2c5ed789

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff8d7a9e3e59904d975f15a84e999cb507287e2541ba1d0ec8886876ed5a6440",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2019-03-14T03:08:28Z",
    "title_canon_sha256": "524572beceecf0d1947ae7b9858894f70a5443d94f380f7fc602d35de88164c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.05799",
    "kind": "arxiv",
    "version": 1
  }
}