Pith Number

pith:JSS72LMX

pith:2020:JSS72LMXI34IXCFRF7RF62JDAW

not attested not anchored not stored refs pending

Why do extremely massive disc galaxies exist today?

Christophe Pichon, Clotilde Laigle, Garreth Martin, Julien Devriendt, Ryan A. Jackson, Sugata Kaviraj, Yohan Dubois

arxiv:2004.00023 v1 · 2020-03-31 · 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{JSS72LMXI34IXCFRF7RF62JDAW}

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	2026-07-05T00:56:48.881644Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ca5fd2d9746f88b88b12fe25f692305ad6d5b50b9c48f621d8dc2ff954f8f32

Aliases

arxiv: 2004.00023 · arxiv_version: 2004.00023v1 · doi: 10.48550/arxiv.2004.00023 · pith_short_12: JSS72LMXI34I · pith_short_16: JSS72LMXI34IXCFR · pith_short_8: JSS72LMX

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/JSS72LMXI34IXCFRF7RF62JDAW \
  | 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: 4ca5fd2d9746f88b88b12fe25f692305ad6d5b50b9c48f621d8dc2ff954f8f32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "241df4bbbe96f1e16afa4eea59bed1188d84e20792c761a531854db0f28aac03",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-03-31T18:00:05Z",
    "title_canon_sha256": "07f62999e8fb21d7c04c9e4f7c97f17f348d232cd05c2ddb50940721321ac569"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.00023",
    "kind": "arxiv",
    "version": 1
  }
}