Pith Number

pith:UZD7V6IN

pith:2021:UZD7V6INJVJKVXPXIGFZN2MM72

not attested not anchored not stored refs pending

Acoustic non-Hermitian skin effect from twisted winding topology

Baile Zhang, Ding Jia, Fujia Chen, Hongsheng Chen, Hong-Xiang Sun, Li Zhang, Qiaolu Chen, Qinghui Yan, Rui Xi, Shou-qi Yuan, Yihao Yang, Yi-jun Guan, Yong Ge, Yuanzhen Li

arxiv:2104.08844 v2 · 2021-04-18 · 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{UZD7V6INJVJKVXPXIGFZN2MM72}

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	2026-07-05T03:30:39.195451Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a647faf90d4d52aaddf7418b96e98cfea1e91de08a7592114a767bc65662201f

Aliases

arxiv: 2104.08844 · arxiv_version: 2104.08844v2 · doi: 10.48550/arxiv.2104.08844 · pith_short_12: UZD7V6INJVJK · pith_short_16: UZD7V6INJVJKVXPX · pith_short_8: UZD7V6IN

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/UZD7V6INJVJKVXPXIGFZN2MM72 \
  | 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: a647faf90d4d52aaddf7418b96e98cfea1e91de08a7592114a767bc65662201f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eea4b814f1a617b2ed1debd804336154eb1afe042adbef849b36b5e63a0b8276",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2021-04-18T12:51:24Z",
    "title_canon_sha256": "3d148dd42aee548f729b6301ec8cde0a33a308fc866144ec6b1548f52d11d51b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.08844",
    "kind": "arxiv",
    "version": 2
  }
}