Pith Number

pith:JU73BZTM

pith:1998:JU73BZTMUU5ISCQMDB5VXFX4DU

not attested not anchored not stored refs pending

A Lightweight Universe?

Neta A. Bahcall, Xiaohui Fan (Princeton University Observatory)

arxiv:astro-ph/9804082 v1 · 1998-04-08 · 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{JU73BZTMUU5ISCQMDB5VXFX4DU}

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	2026-05-18T01:07:37.648502Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d3fb0e66ca53a890a0c187b5b96fc1d17aeb13f443ef88185fb075e0442ff47

Aliases

arxiv: astro-ph/9804082 · arxiv_version: astro-ph/9804082v1 · doi: 10.48550/arxiv.astro-ph/9804082 · pith_short_12: JU73BZTMUU5I · pith_short_16: JU73BZTMUU5ISCQM · pith_short_8: JU73BZTM

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/JU73BZTMUU5ISCQMDB5VXFX4DU \
  | 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: 4d3fb0e66ca53a890a0c187b5b96fc1d17aeb13f443ef88185fb075e0442ff47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d23c26c06e9d594087abe68544d698255e3f2d0833b058ee58d33850f10cbec",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-04-08T01:38:21Z",
    "title_canon_sha256": "04a7fc2084ee533777630364b2b1ef4b8afbbff929f244646e000300a5a4b63a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9804082",
    "kind": "arxiv",
    "version": 1
  }
}