Fixed point syntax!

Hi everyone!

I am a little bit confused how write this:

My map is: . I must calculated a fixed point. I know how to do that and I now how much it is. But problem is in syntax. Is that the right one: and the result in that form ? Or is there and not

Thanks in advance

It is . Your map, F, is acting on functions, not numbers. A "fixed point" of F is a function, such that . Since is defined as a fixed point is a function such that for all x. Of course, from that so that the function is defined by for all x.