Pith Number

pith:B7A4RYH4

pith:2018:B7A4RYH4XKYSAPJZTUL5XYESDH

not attested not anchored not stored refs pending

Optical communication on CubeSats - Enabling the next era in space science

Abhijit Biswas, Alberto Carrasco-Casado, Brian Grefenstette, Fiona Harrison, Morio Toyoshima, Renny Fields, Suzana Sburlan

arxiv:1811.03413 v1 · 2018-10-26 · astro-ph.IM · physics.ins-det · physics.space-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B7A4RYH4XKYSAPJZTUL5XYESDH}

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	2026-05-18T00:01:16.745051Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fc1c8e0fcbab1203d399d17dbe09219de97d4bfe0bc6dd8d2d15409c813c9c4

Aliases

arxiv: 1811.03413 · arxiv_version: 1811.03413v1 · doi: 10.48550/arxiv.1811.03413 · pith_short_12: B7A4RYH4XKYS · pith_short_16: B7A4RYH4XKYSAPJZ · pith_short_8: B7A4RYH4

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/B7A4RYH4XKYSAPJZTUL5XYESDH \
  | 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: 0fc1c8e0fcbab1203d399d17dbe09219de97d4bfe0bc6dd8d2d15409c813c9c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "208b241dc33c16229a523b576d6ebc7d5a4af52392c437f5bdb37445f07c7e18",
    "cross_cats_sorted": [
      "physics.ins-det",
      "physics.space-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-10-26T05:03:48Z",
    "title_canon_sha256": "f19ba5503ca8f8fa69302d847da2503c5326035c4ccdb955ee448ef61ce579a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.03413",
    "kind": "arxiv",
    "version": 1
  }
}