# Double and iterated integral

1. Jun 30, 2015

### Bruno Tolentino

This integral: $$\int \int f(x,y) dx \wedge dy$$ is equal to this integral $$\int \int f(x,y) dx dy$$ ?

2. Jul 1, 2015

### HallsofIvy

Staff Emeritus
If the region of integration is "type I" or "type II" then Fubini's theorem says they are the same. If the region of integration is not either of those, it can be divided into sub-regions that are.