Pith Number

pith:3DUBJC4S

pith:2018:3DUBJC4SDZMTP4S2HMNS2D3EIG

not attested not anchored not stored refs pending

Advances in the accuracy, stability, and reliability of the PTB primary fountain clocks

B. Lipphardt (1), Braunschweig, G. Dobrev (1), Germany (2) The Pennsylvania State University, J. Rahm (1), K. Gibble (2) ((1) Physikalisch-Technische Bundesanstalt (PTB), M. Kazda (1), S. Weyers (1), University Park, USA), V. Gerginov (1)

arxiv:1809.03362 v1 · 2018-09-10 · 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{3DUBJC4SDZMTP4S2HMNS2D3EIG}

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	2026-05-18T00:02:49.096410Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8e8148b921e5937f25a3b1b2d0f6441b23668211535119ba50a5cd1704ea13e

Aliases

arxiv: 1809.03362 · arxiv_version: 1809.03362v1 · doi: 10.48550/arxiv.1809.03362 · pith_short_12: 3DUBJC4SDZMT · pith_short_16: 3DUBJC4SDZMTP4S2 · pith_short_8: 3DUBJC4S

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/3DUBJC4SDZMTP4S2HMNS2D3EIG \
  | 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: d8e8148b921e5937f25a3b1b2d0f6441b23668211535119ba50a5cd1704ea13e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7674c979f4f883e7047fc3fd99e458e6811794557e2f6508b0a8af0a8cff0de4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2018-09-10T14:44:24Z",
    "title_canon_sha256": "b268b877f10a71bee14bbbb7e1fbd2da2c714a1f9f8e550ee4194b2f5fd020e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.03362",
    "kind": "arxiv",
    "version": 1
  }
}