(P(neg)=exp((1/2)(σ^2)(C^2)-(Subscript[Cv, 0]))
ln P(neg)=(1/2)(σ^2)(C^2)-(Subscript[Cv, 0])
(1/2)(σ^2)(C^2)-(Subscript[Cv, 0])-ln P(neg)=0
C=(((Subscript[v, 0])±(Sqrt[(Subscript[v, 0]^2)+4(1/2)(σ^2)ln P(neg)]))/(2(1/2)(σ^2)))
C=(((Subscript[v, 0])±(Sqrt[(Subscript[v, 0]^2)+2(σ^2)ln P(neg)]))/(σ^2))(iii))