Pith Number

pith:7MH4VRVQ

pith:2019:7MH4VRVQNHJSHXCVROI3J7LVB7

not attested not anchored not stored refs pending

Phase-Apodized-Pupil Lyot Coronagraphs for Arbitrary Telescope Pupils

Emiel H. Por

arxiv:1908.02585 v1 · 2019-08-07 · 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{7MH4VRVQNHJSHXCVROI3J7LVB7}

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	2026-07-05T00:36:31.068121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb0fcac6b069d323dc558b91b4fd750fffc504bc92930843428e0838ca67b695

Aliases

arxiv: 1908.02585 · arxiv_version: 1908.02585v1 · doi: 10.48550/arxiv.1908.02585 · pith_short_12: 7MH4VRVQNHJS · pith_short_16: 7MH4VRVQNHJSHXCV · pith_short_8: 7MH4VRVQ

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/7MH4VRVQNHJSHXCVROI3J7LVB7 \
  | 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: fb0fcac6b069d323dc558b91b4fd750fffc504bc92930843428e0838ca67b695

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "442fde91f06b2fda8d743e714eee58f2fa242e8106d67a4ee88e67f7c761d1f1",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-08-07T12:37:06Z",
    "title_canon_sha256": "fc5d2a3adbd5e362909354dfebc1bfe2f79ac1a29ff729211ea4d9ccad152094"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02585",
    "kind": "arxiv",
    "version": 1
  }
}