Pith Number

pith:3PVLNUBP

pith:1997:3PVLNUBPJDJM7QJFDEMVGHBUJT

not attested not anchored not stored refs pending

The z-structure of disk galaxies towards the galaxy planes

Groningen, P.C. van der Kruit (Kapteyn Astronomical Institute, R. de Grijs, R.F. Peletier, the Netherlands)

arxiv:astro-ph/9707074 v1 · 1997-07-07 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3PVLNUBPJDJM7QJFDEMVGHBUJT}

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	2026-07-04T15:50:39.725070Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbeab6d02f48d2cfc1251919531c344cff4e674011264f34d9dbf9f2fc84fd90

Aliases

arxiv: astro-ph/9707074 · arxiv_version: astro-ph/9707074v1 · doi: 10.48550/arxiv.astro-ph/9707074 · pith_short_12: 3PVLNUBPJDJM · pith_short_16: 3PVLNUBPJDJM7QJF · pith_short_8: 3PVLNUBP

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/3PVLNUBPJDJM7QJFDEMVGHBUJT \
  | 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: dbeab6d02f48d2cfc1251919531c344cff4e674011264f34d9dbf9f2fc84fd90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "405ba40d98d359f866ae0fe79b6a5c23a1ab7d5618c7c528fab6ba4aa321d42a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-07-07T12:10:36Z",
    "title_canon_sha256": "2d5ef3948670f9a861160295441852c6031371afc781525e06eb0fb85b717e3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9707074",
    "kind": "arxiv",
    "version": 1
  }
}