Pith Number

pith:HXWMYTED

pith:2025:HXWMYTEDRICGQ4HDZR7NLZYR72

not attested not anchored not stored refs pending

Cornelis Easton:The Milky Way as a spiral galaxy

Pieter C. van der Kruit (Kapteyn Astronomical Institute, the Netherlands), University of Groningen

arxiv:2508.03409 v1 · 2025-08-05 · physics.hist-ph · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HXWMYTEDRICGQ4HDZR7NLZYR72}

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	2026-07-05T11:49:59.672893Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3deccc4c838a046870e3cc7ed5e711feabf975a0cd47799a1762006a4cf2b231

Aliases

arxiv: 2508.03409 · arxiv_version: 2508.03409v1 · doi: 10.48550/arxiv.2508.03409 · pith_short_12: HXWMYTEDRICG · pith_short_16: HXWMYTEDRICGQ4HD · pith_short_8: HXWMYTED

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/HXWMYTEDRICGQ4HDZR7NLZYR72 \
  | 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: 3deccc4c838a046870e3cc7ed5e711feabf975a0cd47799a1762006a4cf2b231

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cee602ab81935fdf9a7443dd66ba09b5178d63f965efee812346e8075d9517d3",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2025-08-05T12:55:06Z",
    "title_canon_sha256": "a3b00499db58562e894a9b00fc756e389d45729995b71b9a5ee044b97914e127"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.03409",
    "kind": "arxiv",
    "version": 1
  }
}