Pith Number

pith:WELFUNBU

pith:2017:WELFUNBUYUVS6CUS5HZTW23UJK

not attested not anchored not stored refs pending

Synthesis of Negative Group Delay Using Lossy Coupling Matrix

Qingfeng Zhang, Ranjan Das

arxiv:1708.02343 v1 · 2017-08-08 · 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{WELFUNBUYUVS6CUS5HZTW23UJK}

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	2026-05-18T00:38:24.707219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1165a3434c52b2f0a92e9f33b6b744ab90def9503cb3f7d5a4c2fd8818cc7de

Aliases

arxiv: 1708.02343 · arxiv_version: 1708.02343v1 · doi: 10.48550/arxiv.1708.02343 · pith_short_12: WELFUNBUYUVS · pith_short_16: WELFUNBUYUVS6CUS · pith_short_8: WELFUNBU

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/WELFUNBUYUVS6CUS5HZTW23UJK \
  | 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: b1165a3434c52b2f0a92e9f33b6b744ab90def9503cb3f7d5a4c2fd8818cc7de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aefea720e6d7ee4076c10ea40792317b9754ea9eeb3f7f3d490dec5815516ada",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2017-08-08T01:19:35Z",
    "title_canon_sha256": "b74982d33e48eb8552351b76a3d2ca814e536424cfa4306144f737624a7496ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.02343",
    "kind": "arxiv",
    "version": 1
  }
}