I am reading the book "Fuzzy Logic with Engineering" written by Timothy J. Ross and there is a phrase in the book at page 90, he mentions about the "Features of the Membership Function". He says:
The support of a membership function for some fuzzy set A under ~ is defined as that region of the universe that is characterized by nonzero membership in the set A under ~. That is, the support comprises those elements x of the universe such that μ A under ~ (x)>0.
He denotes it as a graphical representation:
what is μ A under ~ (x) in this context? Thanks in advance.
Edit Post The μ A under ~ (x) in this context is membership function. https://www.tutorialspoint.com/fuzzy_logic/fuzzy_logic_membership_function.htm