Pith Number

pith:4QGO7MJV

pith:2018:4QGO7MJVJ6AGLK2MR3OKRFFNEV

not attested not anchored not stored refs pending

Fast Linearized Coronagraph Optimizer (FALCO) IV. Coronagraph design survey for obstructed and segmented apertures

A. Riggs, C. C. Stark, C. T. Coker, D. Mawet, E. Sidick, G. Ruane, J. Jewell, K. Balasubramanian, S. B. Shaklan

arxiv:1807.06758 v1 · 2018-07-18 · 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{4QGO7MJVJ6AGLK2MR3OKRFFNEV}

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	2026-05-18T00:06:55.753818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e40cefb1354f8065ab4c8edca894ad255d007c56420bff97784370deed198590

Aliases

arxiv: 1807.06758 · arxiv_version: 1807.06758v1 · doi: 10.48550/arxiv.1807.06758 · pith_short_12: 4QGO7MJVJ6AG · pith_short_16: 4QGO7MJVJ6AGLK2M · pith_short_8: 4QGO7MJV

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/4QGO7MJVJ6AGLK2MR3OKRFFNEV \
  | 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: e40cefb1354f8065ab4c8edca894ad255d007c56420bff97784370deed198590

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dfd2eb7c8c6aaa9d3150a33fb66e05bdb1ec6c1e29cf0a91e85eb61606ab154a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-07-18T03:29:58Z",
    "title_canon_sha256": "657285ab5e41740ca45454bb61375b896480ffcb2463b5e78182e477952862db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.06758",
    "kind": "arxiv",
    "version": 1
  }
}