This is recognizable as the Gateaux derivative of the functional. Monginis also produce more than 30 different gateaux. The directional derivative is a special case of the Gateaux derivative. For counterexamples, see Gateaux derivative. Gateaux derivative cannot be defined in this way. Continuous Gateaux differentiability may be defined in two inequivalent ways. The Gateaux derivative extends the concept to locally convex topological vector spaces. Their other touring success "Waiting For Gateaux" premiered at the Customs House in April 2005. Unlike other forms of derivatives, the Gateaux differential of a function may be nonlinear. The directional derivative calculates the Gateaux derivative as calculated in Beg's original paper and. If, in addition, "f" is Gateaux holomorphic on "U", then "f" is locally bounded holomorphic.