I wonder if there are any plausible examples of this type where the constraints don’t look like ordering on B and search on A.
Yes, as I shown in my post, such operators must know at least an element of one of the domains of the function. If it knows at least an element of A, a constant function on that element has the right type. Unfortunately, it’s not much interesting.
Yes, as I shown in my post, such operators must know at least an element of one of the domains of the function. If it knows at least an element of A, a constant function on that element has the right type. Unfortunately, it’s not much interesting.