Homework Statement
Trying to figure our how to solve the following: \frac{dW}{dσ}
where W(σ) = 2π\int_0^∞y(H(x,σ))x,dx
Homework Equations
both y and H(x,y) are continuous functions from 0 to Infinity
The Attempt at a Solution
Tried using the leibniz rule but it's not really...