Pith Number

pith:PCBBVO4G

pith:2009:PCBBVO4GCLMP23VSOOHMAICKHR

not attested not anchored not stored refs pending

On the role of the Michelson-Morley experiment: Einstein in Chicago

Jeroen van Dongen

arxiv:0908.1545 v1 · 2009-08-11 · physics.hist-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{PCBBVO4GCLMP23VSOOHMAICKHR}

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	2026-05-18T03:07:02.533130Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78821abb8612d8fd6eb2738ec0204a3c4bab2b7e3ef5391d487bd704c415b17f

Aliases

arxiv: 0908.1545 · arxiv_version: 0908.1545v1 · doi: 10.48550/arxiv.0908.1545 · pith_short_12: PCBBVO4GCLMP · pith_short_16: PCBBVO4GCLMP23VS · pith_short_8: PCBBVO4G

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/PCBBVO4GCLMP23VSOOHMAICKHR \
  | 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: 78821abb8612d8fd6eb2738ec0204a3c4bab2b7e3ef5391d487bd704c415b17f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96bbb22e096e6e8d7bff54850e6507559a2ee43ee9875f33b271aab50002dffd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2009-08-11T17:22:43Z",
    "title_canon_sha256": "9f1aa764698a00150b373cfbaf21a70a3a6da7971fe5c52af10a9d2d7cc3e296"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.1545",
    "kind": "arxiv",
    "version": 1
  }
}