👉 In mathematics, a semidomical is a type of periodic function that can be expressed as the sum of two linearly independent functions. It is a special case of an oscillating function where the amplitude and frequency are both equal to 1/2. A semidomain is a region in the complex plane defined by the set of all points x such that the imaginary part of x is less than or equal to 1/2 (i.e., x ≤ 0.5).