Pith Number

pith:NZS22NXT

pith:2011:NZS22NXTGPYHD43YT4OEWZRMFZ

not attested not anchored not stored refs pending

An Acoustic Demonstration of Galileo's Law of Falling Bodies

Elya R. Courtney, Michael Courtney

arxiv:1102.1635 v1 · 2011-02-08 · physics.pop-ph · 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{NZS22NXTGPYHD43YT4OEWZRMFZ}

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	2026-05-18T04:29:52.856905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e65ad36f333f071f3789f1c4b662c2e4de23508b00bf81eac94b4aca8fc0e6b

Aliases

arxiv: 1102.1635 · arxiv_version: 1102.1635v1 · doi: 10.48550/arxiv.1102.1635 · pith_short_12: NZS22NXTGPYH · pith_short_16: NZS22NXTGPYHD43Y · pith_short_8: NZS22NXT

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/NZS22NXTGPYHD43YT4OEWZRMFZ \
  | 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: 6e65ad36f333f071f3789f1c4b662c2e4de23508b00bf81eac94b4aca8fc0e6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a9dd5f003f4cfe3a71ffd223d03e0f9c6129e3ceb072a948fbc9df8e429e1eb",
    "cross_cats_sorted": [
      "physics.class-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2011-02-08T16:07:05Z",
    "title_canon_sha256": "f5b19de6af2b8e3ad860c09a5a14042b1eb126284cca2426cf74577489a6eee0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.1635",
    "kind": "arxiv",
    "version": 1
  }
}