Pith Number

pith:SUT7CWVF

pith:2013:SUT7CWVFTYYZVF6ADRWTH7NXLD

not attested not anchored not stored refs pending

Slipher and the Nature of the Nebulae

K.C. Freeman

arxiv:1301.7509 v1 · 2013-01-31 · 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{SUT7CWVFTYYZVF6ADRWTH7NXLD}

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	2026-05-18T03:34:49.367899Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9527f15aa59e319a97c01c6d33fdb758dd064675a52e746d2a5db67ed282507d

Aliases

arxiv: 1301.7509 · arxiv_version: 1301.7509v1 · doi: 10.48550/arxiv.1301.7509 · pith_short_12: SUT7CWVFTYYZ · pith_short_16: SUT7CWVFTYYZVF6A · pith_short_8: SUT7CWVF

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/SUT7CWVFTYYZVF6ADRWTH7NXLD \
  | 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: 9527f15aa59e319a97c01c6d33fdb758dd064675a52e746d2a5db67ed282507d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d89e2fece1e502fa8dfc8834c9c7acec3b7855cd5f3cf00e2b6ffd88a8197db0",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2013-01-31T04:15:28Z",
    "title_canon_sha256": "5c23d2eded166973212eee75464230782ad35231430350e28f4624b2a2402c2e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.7509",
    "kind": "arxiv",
    "version": 1
  }
}