<human>:  Why is it that the Riemann zeta function has a dimension of 2?
<bot>: That’s because it’s a Riemann zeta function, and Riemann zeta functions are complex valued. They are complex numbers with a real part and an imaginary part. The real part of a complex number is a number, while the imaginary part is a vector in space. A dimension is a measure of how big a space something is. For example, the dimension of a line is 1, while the dimension of a square is 2. The dimension of a plane is 3, and the dimension of a cube is 4. The dimension of a sphere is 6.