Pith Number

pith:XIJHIGVX

pith:1997:XIJHIGVXKNB4S5K3YMBQHQNAWF

not attested not anchored not stored refs pending

A catalogue of galaxy cluster models

Eelco van Kampen (Leiden, Peter Katgert (Leiden), ROE)

arxiv:astro-ph/9704017 v1 · 1997-04-02 · 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{XIJHIGVXKNB4S5K3YMBQHQNAWF}

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	2026-05-18T01:40:17.870669Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba12741ab75343c9755bc30303c1a0b158c5fd59bced2e2d894884a557e0d311

Aliases

arxiv: astro-ph/9704017 · arxiv_version: astro-ph/9704017v1 · doi: 10.48550/arxiv.astro-ph/9704017 · pith_short_12: XIJHIGVXKNB4 · pith_short_16: XIJHIGVXKNB4S5K3 · pith_short_8: XIJHIGVX

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/XIJHIGVXKNB4S5K3YMBQHQNAWF \
  | 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: ba12741ab75343c9755bc30303c1a0b158c5fd59bced2e2d894884a557e0d311

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a93d0fe48a827592d65c1a81592f94f8d4c4c0097878370328150ea2dd2b3f9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-04-02T14:01:30Z",
    "title_canon_sha256": "942a35db53dc860fac80f4798fdcd8a756f1e4479bb82a6274a059991d7999a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9704017",
    "kind": "arxiv",
    "version": 1
  }
}