A quick question -- is it acceptable to use angle braces when integrating a vector function, instead of expressing the vector i.t.o unit vectors? E.g. say ∫<x,2x,3x> dx This form seems far more convenient and suggestive than ∫ [xi + 2xj + 3xk] dx. Especially with ugly functions. However I've looked though a few textbooks and I've never seen this notation used with integration (or differentiation?) of a vector fxn...is there some reason, or is it just convention?