In Serge Lang’s Complex Analysis, he says that a prerequisite is 2 years if calculus. But I’m not sure exactly what he means by this. In regards to calculus related courses, I’ve done 3 semesters of real analysis, 1 semester of (non rigorous) complex analysis, 1 semester of single variable calculus, 1 semester of multivariable calculus and 1 semester of vector calculus (as well as some ODE/PDE courses).
Is this enough calculus, or does he specifically mean that you need to do 1 full year of single variable and 1 full year of multivariable calculus?
Thanks