Pith Number

pith:A4XU6T3X

pith:2018:A4XU6T3XORZXSY7MPG3YHD6SMR

not attested not anchored not stored refs pending

Kernel-nulling for a robust direct interferometric detection of extrasolar planets

Frantz Martinache, Michael J. Ireland

arxiv:1802.06252 v2 · 2018-02-17 · 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{A4XU6T3XORZXSY7MPG3YHD6SMR}

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	2026-05-18T00:00:45.902448Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

072f4f4f7774737963ec79b7838fd2646ba6b7c2b7ba78800879d922c0c16463

Aliases

arxiv: 1802.06252 · arxiv_version: 1802.06252v2 · doi: 10.48550/arxiv.1802.06252 · pith_short_12: A4XU6T3XORZX · pith_short_16: A4XU6T3XORZXSY7M · pith_short_8: A4XU6T3X

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/A4XU6T3XORZXSY7MPG3YHD6SMR \
  | 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: 072f4f4f7774737963ec79b7838fd2646ba6b7c2b7ba78800879d922c0c16463

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "323b8d4dbcbe912b4b0a7b9c65dad62624d13b1d85fb3ea4790336fbdceb0de1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-02-17T15:44:04Z",
    "title_canon_sha256": "353fc6066381c2aef11a71b8d2e43ff7f34e37618aa8788c5a206374cf0e9f62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.06252",
    "kind": "arxiv",
    "version": 2
  }
}