Function exp

src/compute-engine/interval/elementary.ts:316–321

(x: Interval | IntervalResult)

/**
 * Exponential function (e^x).
 *
 * Always valid, monotonically increasing.
 */
function expRaw(x: Interval | IntervalResult): IntervalResult {
  const unwrapped = unwrapOrPropagate(x);
  if (!Array.isArray(unwrapped)) return unwrapped;
  const [xVal] = unwrapped;
  return ok({ lo: Math.exp(xVal.lo), hi: Math.exp(xVal.hi) });