Pith Number

pith:IWL3ZY66

pith:2018:IWL3ZY66LWAQDZJFEGDO6W4TA6

not attested not anchored not stored refs pending

Constraints on the existence of dark matter haloes by the M81 group and the Hickson compact groups of galaxies

Charles University), Pavel Kroupa (Bonn University, Wolfgang Oehm (Bonn)

arxiv:1811.03095 v1 · 2018-11-07 · 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{IWL3ZY66LWAQDZJFEGDO6W4TA6}

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	2026-05-18T00:01:19.089147Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4597bce3de5d8101e5252186ef5b930781287e0ec2ae12475d5783374367a634

Aliases

arxiv: 1811.03095 · arxiv_version: 1811.03095v1 · doi: 10.48550/arxiv.1811.03095 · pith_short_12: IWL3ZY66LWAQ · pith_short_16: IWL3ZY66LWAQDZJF · pith_short_8: IWL3ZY66

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/IWL3ZY66LWAQDZJFEGDO6W4TA6 \
  | 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: 4597bce3de5d8101e5252186ef5b930781287e0ec2ae12475d5783374367a634

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4aaa41bbbe51162c9fe3bd0c81ceb513993b9f208d9be7f9afb4d851d7a5ce4a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-11-07T19:00:00Z",
    "title_canon_sha256": "dfad33cdea15967b583b17c2fa4e61f5b134f02624b122c74f72b9d9daa02e91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.03095",
    "kind": "arxiv",
    "version": 1
  }
}