they say that the integral represents all the solutions for the equation
i cant understand why???
as i see it we can multiply our found single solution and multiply it by a constant
and we get endless variations of our single solution.
ok so A(k) is like multiplying by constant
it creates a variety of solutions which differ by the multiplication of this function
depending on the k we put inside
whats the integral for?
integral means sum for me
why they sum all the solutions?
of course k needs to go from plus infinity till minus infinity
but why sum all the solutions??