I am reading book "Fuzzy Logic With Engineering Applications, Wiley" written by Timothy J. Ross. I am reading chapter 7 and in this chapter, "Batch Least Squares Algoritm" has been defined. It illustrates the development of a nonlinear fuzzy model for the data in Table 7.1 using the Batch Least Squares algorithm.
At the page 218 there is a mathematical equation:
I have two questions: 1- As you can see, there is a "exp" phrase (in the red rectangle). What is this? Is it the exponential function? (https://en.wikipedia.org/wiki/Exponential_function)
At the link, "What is the meaning of $\exp(\,\cdot\,)$?" it was stated at the link that it is an exponential function, but I noticed that ordinary paranthesis has been used. In my equation, square brackets is used.
2- What is the purpose of the equation?
Thanks in advance.