Pith Number

pith:YUL4MFBK

pith:2018:YUL4MFBKUBKJPGC6XILCJYGKID

not attested not anchored not stored refs pending

Vortex fiber nulling for exoplanet observations. I. Experimental demonstration in monochromatic light

Daniel Echeverri, Dimitri Mawet, Garreth Ruane, Nemanja Jovanovic, Nicolas Levraud

arxiv:1811.02083 v2 · 2018-11-05 · astro-ph.IM · astro-ph.EP · 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{YUL4MFBKUBKJPGC6XILCJYGKID}

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	2026-05-17T23:46:41.412357Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c517c6142aa05497985eba1624e0ca40d3619e02e45b6a438dd34f56dcc2b4db

Aliases

arxiv: 1811.02083 · arxiv_version: 1811.02083v2 · doi: 10.48550/arxiv.1811.02083 · pith_short_12: YUL4MFBKUBKJ · pith_short_16: YUL4MFBKUBKJPGC6 · pith_short_8: YUL4MFBK

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/YUL4MFBKUBKJPGC6XILCJYGKID \
  | 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: c517c6142aa05497985eba1624e0ca40d3619e02e45b6a438dd34f56dcc2b4db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7deda279314559ac7941a79da65824297f68b96c8f75348330a87eaf272f751a",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-11-05T23:13:45Z",
    "title_canon_sha256": "448d343d1c070a875496d904c70b4a6e9dca8f46b6d353218d83079fcc9cf730"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.02083",
    "kind": "arxiv",
    "version": 2
  }
}