How does one calculate the Lebesgue Measure of the above set?
I tried the following:
$ \lambda^2(A) = \int_{R^2} 1_A d(\lambda^2(x,y)) = \int_R\int_x^2 1_{ \{1/x < y\} } d\lambda(y)d\lambda(x)$
but then I have no idea how to reformulate the inequality $1/x < y $.