Pith Number

pith:2QGYLQLV

pith:2017:2QGYLQLVNWYAAM7O7FIBC4OZRM

not attested not anchored not stored refs pending

The abundance of ultra-diffuse galaxies from groups to clusters: UDGs are relatively more common in more massive haloes

Adam Muzzin, Benne W. Holwerda, Catherine Heymans, Cristobal Sifon, Dominik Klaes, Edward N. Taylor, Edwin Valentijn, Hendrik Hildebrandt, Henk Hoekstra, Konrad Kuijken, Malcolm N. Bremer, Massimo Viola, Nicola Napolitano, Peder Norberg, Reiko Nakajima, Remco F. J. van der Burg, Sarah Brough, Sean McGee, Simon P. Driver, Thomas Erben

arxiv:1706.02704 v2 · 2017-06-08 · astro-ph.GA

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

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	2026-05-18T00:29:55.366257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d40d85c1756db00033eef9501171d98b3d5ae1ba4ae0607f7af4b9c49fd9d6a7

Aliases

arxiv: 1706.02704 · arxiv_version: 1706.02704v2 · doi: 10.48550/arxiv.1706.02704 · pith_short_12: 2QGYLQLVNWYA · pith_short_16: 2QGYLQLVNWYAAM7O · pith_short_8: 2QGYLQLV

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/2QGYLQLVNWYAAM7O7FIBC4OZRM \
  | 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: d40d85c1756db00033eef9501171d98b3d5ae1ba4ae0607f7af4b9c49fd9d6a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3afcb95fa1c47cca49c01bb56655d918459dff12dae2184b70b27e28f34052f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-06-08T18:00:01Z",
    "title_canon_sha256": "4f5143eed77c0cecb41d09bcebabad7374368483c3038ee4f15891a89e22a7b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.02704",
    "kind": "arxiv",
    "version": 2
  }
}