Pith Number

pith:4FGQNWEH

pith:2019:4FGQNWEH37BDFU4MKWJTXFRA4L

not attested not anchored not stored refs pending

Automated first-order design of double-sided telecentric zoom systems based on PSO algorithms

Donglin Ma, Shili Wei, Yan Mo, Yiming Yan, Zhengbo Zhu, Zichao Fan

arxiv:1902.10555 v1 · 2019-02-27 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4FGQNWEH37BDFU4MKWJTXFRA4L}

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	2026-05-17T23:52:30.539292Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e14d06d887dfc232d38c55933b9620e2c162a7c9b3076397d25f60ac200c7a1b

Aliases

arxiv: 1902.10555 · arxiv_version: 1902.10555v1 · doi: 10.48550/arxiv.1902.10555 · pith_short_12: 4FGQNWEH37BD · pith_short_16: 4FGQNWEH37BDFU4M · pith_short_8: 4FGQNWEH

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/4FGQNWEH37BDFU4MKWJTXFRA4L \
  | 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: e14d06d887dfc232d38c55933b9620e2c162a7c9b3076397d25f60ac200c7a1b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3569f4caef8242dc9724da0d9bcf59251108960ebf53f98e3b2987a106bee97a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2019-02-27T14:34:23Z",
    "title_canon_sha256": "50243aaa6a97adb21e4236691c6ded931b26aaec01e214149221404f429a6403"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.10555",
    "kind": "arxiv",
    "version": 1
  }
}