Pith Number

pith:2VVPW7YC

pith:2020:2VVPW7YCBQVBIYLFMBA7X4627T

not attested not anchored not stored refs pending

Few-Mode Fiber Coupling Efficiency for Free-Space Optical Communication

Dawei Wang, Jingkai Yang, Jing Ma, Julian Cheng, Xingjie Fan

arxiv:2009.14392 v1 · 2020-09-30 · physics.optics · eess.SP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2VVPW7YCBQVBIYLFMBA7X4627T}

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	2026-07-05T02:40:29.094995Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d56afb7f020c2a1461656041fbf3dafcd1dfd71d34d56eb1c7facfa2ff4fdba3

Aliases

arxiv: 2009.14392 · arxiv_version: 2009.14392v1 · doi: 10.48550/arxiv.2009.14392 · pith_short_12: 2VVPW7YCBQVB · pith_short_16: 2VVPW7YCBQVBIYLF · pith_short_8: 2VVPW7YC

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/2VVPW7YCBQVBIYLFMBA7X4627T \
  | 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: d56afb7f020c2a1461656041fbf3dafcd1dfd71d34d56eb1c7facfa2ff4fdba3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e05b5cb81f92f64fd3e7efb58e6e6466ace3fda6e1ae31a9aa357f6dc2fb8cd",
    "cross_cats_sorted": [
      "eess.SP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2020-09-30T02:18:00Z",
    "title_canon_sha256": "cf3060450766f17d528270c606b1801e8cd10acd04db5f39879c97e98f797e8d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.14392",
    "kind": "arxiv",
    "version": 1
  }
}