Pith Number

pith:P2FUDB6S

pith:2026:P2FUDB6SW4FV2HEMZWSMQCDZCJ

not attested not anchored not stored refs pending

Combining a Diffraction-Limited Coronagraph with Fiber Nulling: A Demonstration of Serially Coupling Different Nullers

Motohide Tamura, Oliver Guyon, Reiki Kojima, Satoshi Itoh, Takahiro Sumi, Taro Matsuo

arxiv:2606.31336 v1 · 2026-06-30 · 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{P2FUDB6SW4FV2HEMZWSMQCDZCJ}

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	2026-07-01T01:17:59.623731Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e8b4187d2b70b5d1c8ccda4c80879125f135b4ad9d13d6aef0e16f8fe675704

Aliases

arxiv: 2606.31336 · arxiv_version: 2606.31336v1 · doi: 10.48550/arxiv.2606.31336 · pith_short_12: P2FUDB6SW4FV · pith_short_16: P2FUDB6SW4FV2HEM · pith_short_8: P2FUDB6S

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/P2FUDB6SW4FV2HEMZWSMQCDZCJ \
  | 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: 7e8b4187d2b70b5d1c8ccda4c80879125f135b4ad9d13d6aef0e16f8fe675704

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "353aedd8a50f1279c221589ea634a2101bff26549641a32b1ed4fec5698487db",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2026-06-30T08:36:34Z",
    "title_canon_sha256": "01d01312e07cdc459cde97027b1e2b3f90eafd8d0edd1466c137f848962838cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.31336",
    "kind": "arxiv",
    "version": 1
  }
}