Pith Number

pith:NVM6WF7N

pith:2000:NVM6WF7NHLYZHSO2VV3SGP5LQJ

not attested not anchored not stored refs pending

A mechanical model that exhibits a gravitational critical radius

Kirk T. McDonald

arxiv:physics/0006075 v1 · 2000-06-29 · physics.class-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{NVM6WF7NHLYZHSO2VV3SGP5LQJ}

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	2026-07-04T16:22:13.164468Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d59eb17ed3af193c9daad77233fab824db2501df5dca798d8df030f50e2fc29

Aliases

arxiv: physics/0006075 · arxiv_version: physics/0006075v1 · doi: 10.48550/arxiv.physics/0006075 · pith_short_12: NVM6WF7NHLYZ · pith_short_16: NVM6WF7NHLYZHSO2 · pith_short_8: NVM6WF7N

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/NVM6WF7NHLYZHSO2VV3SGP5LQJ \
  | 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: 6d59eb17ed3af193c9daad77233fab824db2501df5dca798d8df030f50e2fc29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff1402c56a1da77011825f492321f006cb3da825938f27f8503071a27d9320f2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2000-06-29T02:45:29Z",
    "title_canon_sha256": "d92be14ee9a3fffe86889f18e783fbbaf5ead810f105b42281cf9895d32c20f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0006075",
    "kind": "arxiv",
    "version": 1
  }
}