I hope its allowed to ask a more "general" question here I just started learning multivariable integral, and we just learned about the null set and Lebesgue measure ( in our defention we use cubes to define the lebesgue and null set) and to be honest I feel a bit lost and that I dont really understand the subject.
I was hoping to get some reccomendation about books I could read on the subject, if it has some examples and solved exercises it will be wonderfull.
thanks to everyone
