Hw5 ex1 - norm minimization

Q How do we solve the minimization problem for ${\sqrt {||{\dot {x}}||}}$?

A The minimization of the square root of the norm is difficult; though one will have the same result by minimizing just $||{\dot {x}}||$, where with this notation we mean ${\dot {x}}^{T}{\dot {x}}$

--Elisa