Algorithm 7 Project the gradient vector field w ∈ Tα() to v ∈ Tα(0)
1:	for τ = 0 to k do
2:	$v\left(\frac{\tau }{k}\right)=w\left(\frac{\tau }{k}\right)-\frac{\tau }{k}\stackrel{\sim }{w}\left(\frac{\tau }{k}\right)$
3:	end for