Function isDimensionless

src/compute-engine/numerics/unit-data.ts:222–232

(dim: DimensionVector)

  '\u00C5': { dimension: [1, 0, 0, 0, 0, 0, 0, 0], scale: 1e-10 }, // Å

  // ---- Currency (8th dimension) ----
  // Only USD is represented. EUR/GBP/etc. have no fixed exchange rate to USD,
  // so they are deliberately unrepresentable rather than encoded with a wrong
  // (drifting) scale — same principle as the "NO ton(s) alias" note in
  // definitions-units.ts.
  'USD': { dimension: [0, 0, 0, 0, 0, 0, 0, 1], scale: 1 },
  'cent': { dimension: [0, 0, 0, 0, 0, 0, 0, 1], scale: 0.01 },
};

// ---------------------------------------------------------------------------
// Internal helpers
// ---------------------------------------------------------------------------

export function dimensionsEqual(