Help for a "Surface and Flux integrals" program

[AlexFekken]

(11-04-2017 11:27 AM)salvomic Wrote:  I was following the order of the book (drho, dtheta), I forgot that in the Prime is correct the inverse...

I don't know which book you are looking at but the convention is pretty standard: the integration symbols (with intervals) and differentials act as opening and closing pairs of brackets. I.e. the first range corresponds to the last variable, etc... I can't remember ever seeing a book where this was different.