Pith Number

pith:CP4F7AAH

pith:2024:CP4F7AAHX6EBGWIVVMN4O7LLFO

not attested not anchored not stored refs pending

Carl Wirtz' article from 1924 in Astronomische Nachrichten on the radial motions of spiral nebulae

Tom Richtler

arxiv:2411.09606 v1 · 2024-11-14 · physics.hist-ph · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CP4F7AAHX6EBGWIVVMN4O7LLFO}

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	2026-07-05T09:35:29.518239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13f85f8007bf88135915ab1bc77d6b2ba7907abb6c9c878289dd369553601096

Aliases

arxiv: 2411.09606 · arxiv_version: 2411.09606v1 · doi: 10.48550/arxiv.2411.09606 · pith_short_12: CP4F7AAHX6EB · pith_short_16: CP4F7AAHX6EBGWIV · pith_short_8: CP4F7AAH

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/CP4F7AAHX6EBGWIVVMN4O7LLFO \
  | 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: 13f85f8007bf88135915ab1bc77d6b2ba7907abb6c9c878289dd369553601096

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2452c5e8bd4ac11421397c7aaea5408382dead1be61703fe908771f1d647d812",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2024-11-14T17:23:30Z",
    "title_canon_sha256": "810dc018c43fda3de682cd8c2c10be68a675ca5d88fc68f10ad72ec39035c135"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2411.09606",
    "kind": "arxiv",
    "version": 1
  }
}