Pith Number

pith:VXAYCGOG

pith:2009:VXAYCGOGVW4WBCXQDMXBVY6QMN

not attested not anchored not stored refs pending

Interrogation of caesium atoms in a fountain clock by a femtosecond laser microwave oscillator

B. Lipphardt, H. Schnatz, S. Weyers

arxiv:0901.2788 v1 · 2009-01-19 · 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{VXAYCGOGVW4WBCXQDMXBVY6QMN}

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	2026-05-18T00:02:50.328944Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

adc18119c6adb9608af01b2e1ae3d0634adaf25b4291b0eb4aba3f7825643094

Aliases

arxiv: 0901.2788 · arxiv_version: 0901.2788v1 · doi: 10.48550/arxiv.0901.2788 · pith_short_12: VXAYCGOGVW4W · pith_short_16: VXAYCGOGVW4WBCXQ · pith_short_8: VXAYCGOG

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/VXAYCGOGVW4WBCXQDMXBVY6QMN \
  | 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: adc18119c6adb9608af01b2e1ae3d0634adaf25b4291b0eb4aba3f7825643094

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b11db6c894070289d644b1a3c211d3a2ea0d1e947006d7612bc72a2c243411d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2009-01-19T09:03:44Z",
    "title_canon_sha256": "8bc6c6d498b168c7213210ec5c7091709bc54085bae8b6c6aa5c759a607722e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2788",
    "kind": "arxiv",
    "version": 1
  }
}