Pith Number

pith:MAMJ7KK6

pith:2015:MAMJ7KK6253O7OEGJWFQPCFEDB

not attested not anchored not stored refs pending

Frequency Ratio of ${}^{199}$Hg and ${}^{87}$Sr Optical Lattice Clocks beyond the SI Limit

Hidetoshi Katori, Ichiro Ushijima, Kazuhiro Yamanaka, Masao Takamoto, Noriaki Ohmae

arxiv:1503.07941 v1 · 2015-03-27 · physics.atom-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{MAMJ7KK6253O7OEGJWFQPCFEDB}

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	2026-05-18T02:20:11.887622Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60189fa95ed776efb8864d8b0788a4185bfbbbdbb04ab049c38891486881d451

Aliases

arxiv: 1503.07941 · arxiv_version: 1503.07941v1 · doi: 10.48550/arxiv.1503.07941 · pith_short_12: MAMJ7KK6253O · pith_short_16: MAMJ7KK6253O7OEG · pith_short_8: MAMJ7KK6

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/MAMJ7KK6253O7OEGJWFQPCFEDB \
  | 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: 60189fa95ed776efb8864d8b0788a4185bfbbbdbb04ab049c38891486881d451

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f59e03a151c2ab24c9f29f2601604ef6ea7510a161b9932e54448af166af3e22",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2015-03-27T01:44:10Z",
    "title_canon_sha256": "c58d521abeb781043237f8fe6e9687146bfbc2dc7dc1b9f67648d7011457fcbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.07941",
    "kind": "arxiv",
    "version": 1
  }
}