Pith Number

pith:PHPWTHTU

pith:2016:PHPWTHTUX3VRGFZGTPU3YRXXZF

not attested not anchored not stored refs pending

Shaped Pupil Lyot Coronagraphs: High-Contrast Solutions for Restricted Focal Planes

A J Eldorado Riggs, Alexis Carlotti, Neil T. Zimmerman, N. Jeremy Kasdin, Robert J. Vanderbei

arxiv:1601.05121 v1 · 2016-01-19 · astro-ph.IM · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PHPWTHTUX3VRGFZGTPU3YRXXZF}

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	2026-05-18T01:22:16.095945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79df699e74beeb1317269be9bc46f7c9409cfd5d0cd823175168640fc00c3dca

Aliases

arxiv: 1601.05121 · arxiv_version: 1601.05121v1 · doi: 10.48550/arxiv.1601.05121 · pith_short_12: PHPWTHTUX3VR · pith_short_16: PHPWTHTUX3VRGFZG · pith_short_8: PHPWTHTU

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/PHPWTHTUX3VRGFZGTPU3YRXXZF \
  | 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: 79df699e74beeb1317269be9bc46f7c9409cfd5d0cd823175168640fc00c3dca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c3ab004c6fd959d447dfba9fc9723c2c0f7bb2735c33240e7e26e9f7397b3fc",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2016-01-19T22:29:26Z",
    "title_canon_sha256": "d88b5c9653c57dfeabf239dab62735b5ef37efeb88fb626b02adae0ed5a41a99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.05121",
    "kind": "arxiv",
    "version": 1
  }
}