Pith Number

pith:XMUAOQGI

pith:2009:XMUAOQGILZS3S2ROZDZCDKHBTU

not attested not anchored not stored refs pending

High-resolution microwave frequency dissemination on an 86-km urban optical link

A. Amy-Klein, Ch. Chardonnet, G. Santarelli, M. Lours, O. Lopez

arxiv:0907.3500 v2 · 2009-07-20 · physics.optics

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

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	2026-05-18T02:12:55.313967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb280740c85e65b96a2ec8f221a8e19d17fca2a02e2c684003e1919b82f97156

Aliases

arxiv: 0907.3500 · arxiv_version: 0907.3500v2 · doi: 10.48550/arxiv.0907.3500 · pith_short_12: XMUAOQGILZS3 · pith_short_16: XMUAOQGILZS3S2RO · pith_short_8: XMUAOQGI

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/XMUAOQGILZS3S2ROZDZCDKHBTU \
  | 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: bb280740c85e65b96a2ec8f221a8e19d17fca2a02e2c684003e1919b82f97156

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2051bc11656a0dfe06ed56b08cfc5a9740718252382341791917cc10dd8258e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2009-07-20T21:53:02Z",
    "title_canon_sha256": "40a4e7caf3864ce519c729c5702c50a9bb5ad8988d3bbd292c081b65254168da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3500",
    "kind": "arxiv",
    "version": 2
  }
}