Pith Number

pith:6OYIKQF6

pith:2018:6OYIKQF6E27BYH6J6W4WT6FSDN

not attested not anchored not stored refs pending

Reply to the claim by van Dokkum et al. for a galaxy not containing dark matter

Martin Lopez-Corredoira, Renato Falomo, Ricardo Adan Cortes Martin, Riccardo Scarpa, Xavier Hernandez

arxiv:1805.04817 v2 · 2018-05-13 · 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{6OYIKQF6E27BYH6J6W4WT6FSDN}

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	2026-05-18T00:16:02.627482Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3b08540be26be1c1fc9f5b969f8b21b455e872c12a4076e7280ef59e7747dd8

Aliases

arxiv: 1805.04817 · arxiv_version: 1805.04817v2 · doi: 10.48550/arxiv.1805.04817 · pith_short_12: 6OYIKQF6E27B · pith_short_16: 6OYIKQF6E27BYH6J · pith_short_8: 6OYIKQF6

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/6OYIKQF6E27BYH6J6W4WT6FSDN \
  | 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: f3b08540be26be1c1fc9f5b969f8b21b455e872c12a4076e7280ef59e7747dd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e5094d218e984596aebbb92701054fc4e4bab0fe1566951257638cb40afeb97",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-05-13T04:31:26Z",
    "title_canon_sha256": "c079023c931c8cbf6fa4443008f2119612e29bc548ac02403a8561abcc863793"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.04817",
    "kind": "arxiv",
    "version": 2
  }
}