Pith Number

pith:PRHP5AVU

pith:2011:PRHP5AVUK2XOGDQ4TOBWJQRJAP

not attested not anchored not stored refs pending

How can one detect the rotation of the Earth "around the Moon"? Part 2: Ultra-slow fall

Bertrand M. Roehner

arxiv:1112.5408 v1 · 2011-12-22 · 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{PRHP5AVUK2XOGDQ4TOBWJQRJAP}

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	2026-05-18T04:05:47.407530Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c4efe82b456aee30e1c9b8364c22903f304e621af13d9ff267e02aadd42984b

Aliases

arxiv: 1112.5408 · arxiv_version: 1112.5408v1 · doi: 10.48550/arxiv.1112.5408 · pith_short_12: PRHP5AVUK2XO · pith_short_16: PRHP5AVUK2XOGDQ4 · pith_short_8: PRHP5AVU

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/PRHP5AVUK2XOGDQ4TOBWJQRJAP \
  | 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: 7c4efe82b456aee30e1c9b8364c22903f304e621af13d9ff267e02aadd42984b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5617b3dae2c63861080c1cae8c6e35e846f9b33315e78a8abffba1cc67925dd5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2011-12-22T18:26:51Z",
    "title_canon_sha256": "976f6624d3f8122404c872c8788ec9fe638b5ca9cfbda94a0a29449e12b45860"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.5408",
    "kind": "arxiv",
    "version": 1
  }
}