Recent content by Ketsha

Thanks for the awesome solution... that was really well explained :) and has solved one of my biggest troubles. :)

ok this seems like a predominantly maths problem but i need it for a little project of mine related to classical dynamics. So i have 2d numbers Xk, which are constrained by the relation that their sum is n. what i need to find out is the number of possible permutations of the 2d numbers (Xk)...