# Math Help - Bounded variation

1. ## Bounded variation

Thanks

2. Originally Posted by Amer
Given $f:[a,b] \to \mathbb{R}$ and a partition $P=\{a=t_0 < t_1 < ... < t_n=b \}$ then the vatiatin of fo over P is $V(f,P)=\sum_{n=0}^{n}|f(t_i)-f(t_{i-1}|$
Now if we take the supreemum of all partitions of [a,b] This is called the total variation if $\sup_{P}=V(f,p) < \infty$