Pith Number

pith:4O3XH5QH

pith:2008:4O3XH5QH7PC46QBOZB4O5V3RS5

not attested not anchored not stored refs pending

What is the closest black hole to the Sun?

C. Foellmi

arxiv:0812.4232 v3 · 2008-12-22 · 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{4O3XH5QH7PC46QBOZB4O5V3RS5}

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	2026-05-18T02:15:04.002242Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3b773f607fbc5cf402ec878eed771974b8c642a8487eed8e4e840a865bffb9e

Aliases

arxiv: 0812.4232 · arxiv_version: 0812.4232v3 · doi: 10.48550/arxiv.0812.4232 · pith_short_12: 4O3XH5QH7PC4 · pith_short_16: 4O3XH5QH7PC46QBO · pith_short_8: 4O3XH5QH

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/4O3XH5QH7PC46QBOZB4O5V3RS5 \
  | 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: e3b773f607fbc5cf402ec878eed771974b8c642a8487eed8e4e840a865bffb9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "038a1c5dc0a93a9f589090ebe77a8b5b8e653bfcb65bc513b036d4abd330beee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-22T16:26:16Z",
    "title_canon_sha256": "b064daadd396168c516a140ec83afbf616271d72ca6ad443a3b70d79caf13798"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.4232",
    "kind": "arxiv",
    "version": 3
  }
}