Pith Number

pith:FZ7UHR5N

pith:2017:FZ7UHR5NT3R3PZANJAEEFXONPT

not attested not anchored not stored refs pending

Design and experimental test of an optical vortex coronagraph

Chengchao Liu, Deqing Ren, Jiangpei Dou, Yongtian Zhu

arxiv:1703.04228 v2 · 2017-03-13 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FZ7UHR5NT3R3PZANJAEEFXONPT}

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	2026-05-18T00:42:29.298970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e7f43c7ad9ee3b7e40d480842ddcd7ce40ba297f8027a8867d7ddc3e863b8ee

Aliases

arxiv: 1703.04228 · arxiv_version: 1703.04228v2 · doi: 10.48550/arxiv.1703.04228 · pith_short_12: FZ7UHR5NT3R3 · pith_short_16: FZ7UHR5NT3R3PZAN · pith_short_8: FZ7UHR5N

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/FZ7UHR5NT3R3PZANJAEEFXONPT \
  | 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: 2e7f43c7ad9ee3b7e40d480842ddcd7ce40ba297f8027a8867d7ddc3e863b8ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e9c3aed574c88ae53d3a81dc866400e493e02293dfd69e999d6c226152ee4ed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2017-03-13T02:43:12Z",
    "title_canon_sha256": "41907a36251d2572bdeecc5e614da69c79b21bad28f1c320f80b01e9b7b2c680"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.04228",
    "kind": "arxiv",
    "version": 2
  }
}