Pith Number

pith:R5HQIH7Q

pith:1993:R5HQIH7QLB3QFSSOP3CDDMHYR3

not attested not anchored not stored refs pending

Mergers of Systems Containing Gas

F.R.Pearce, H.M.P.Couchman, P.A.Thomas

arxiv:astro-ph/9310023 v1 · 1993-10-13 · 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{R5HQIH7QLB3QFSSOP3CDDMHYR3}

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	2026-05-18T01:40:26.503375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f4f041ff0587702ca4e7ec431b0f88ec5f66798f0e49c54d4916d3b7ecfbd30

Aliases

arxiv: astro-ph/9310023 · arxiv_version: astro-ph/9310023v1 · doi: 10.48550/arxiv.astro-ph/9310023 · pith_short_12: R5HQIH7QLB3Q · pith_short_16: R5HQIH7QLB3QFSSO · pith_short_8: R5HQIH7Q

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/R5HQIH7QLB3QFSSOP3CDDMHYR3 \
  | 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: 8f4f041ff0587702ca4e7ec431b0f88ec5f66798f0e49c54d4916d3b7ecfbd30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "666abfc9e5e6fa596fc22ccd1c92972d7b33f7af7bbe3198735f88dede100a80",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1993-10-13T19:59:00Z",
    "title_canon_sha256": "8f31bf0aa8180d4d2f2a7780cd801336368f3a6e5d925268f70c8d25280da685"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9310023",
    "kind": "arxiv",
    "version": 1
  }
}