Pith Number

pith:HYHX4J7B

pith:1999:HYHX4J7BST3NL6UO34PN76JZHO

not attested not anchored not stored refs pending

On the migration of a system of protoplanets

Germany), University of Jena, Willy Kley (Theoretical Physics Institute

arxiv:astro-ph/9910155 v1 · 1999-10-08 · 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{HYHX4J7BST3NL6UO34PN76JZHO}

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	2026-05-18T01:07:35.978947Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e0f7e27e194f6d5fa8edf1edff9393b97d125934863c603469e0e53d9d80066

Aliases

arxiv: astro-ph/9910155 · arxiv_version: astro-ph/9910155v1 · doi: 10.48550/arxiv.astro-ph/9910155 · pith_short_12: HYHX4J7BST3N · pith_short_16: HYHX4J7BST3NL6UO · pith_short_8: HYHX4J7B

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/HYHX4J7BST3NL6UO34PN76JZHO \
  | 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: 3e0f7e27e194f6d5fa8edf1edff9393b97d125934863c603469e0e53d9d80066

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09e359f908ee145d184cce1bb3501eb785705cfb50c50e39f7611021ff589e96",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-10-08T09:47:16Z",
    "title_canon_sha256": "5dc7a669f931c50311e480782b30b69e283cdcf5a2bb047b143c55f41357dc83"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9910155",
    "kind": "arxiv",
    "version": 1
  }
}