Pith Number

pith:PKEKDFUK

pith:1999:PKEKDFUKT46HJOJPWBSBM3S246

not attested not anchored not stored refs pending

On the axis ratio of the stellar velocity ellipsoid in disks of spiral galaxies

1) ((1) Kapteyn Institute, Groningen, P.C. van der Kruit (1), R. de Grijs (2, the Netherlands; (2) Astronomy Department, University of Virginia, USA)

arxiv:astro-ph/9910288 v1 · 1999-10-15 · 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{PKEKDFUKT46HJOJPWBSBM3S246}

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	2026-07-04T14:17:13.464344Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a88a1968a9f3c74b92fb064166e5ae7acc1dcd6080c969699d6e930409d58bc

Aliases

arxiv: astro-ph/9910288 · arxiv_version: astro-ph/9910288v1 · doi: 10.48550/arxiv.astro-ph/9910288 · pith_short_12: PKEKDFUKT46H · pith_short_16: PKEKDFUKT46HJOJP · pith_short_8: PKEKDFUK

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/PKEKDFUKT46HJOJPWBSBM3S246 \
  | 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: 7a88a1968a9f3c74b92fb064166e5ae7acc1dcd6080c969699d6e930409d58bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac18dfc1c30809f833358ee7cd6a1add8ee8b3b3943bd7f6db58cc7b1af5c545",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-10-15T14:34:54Z",
    "title_canon_sha256": "954549f9326255048bd7705cd8ab585e4bbc5affd8bee1dd041fe235dae0046a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9910288",
    "kind": "arxiv",
    "version": 1
  }
}