We remark that c is well-directed iff there is an [epsilon] > 0 such that [epsilon]c is a feasible flow.
b](f) with [delta]([gamma](c)) > 0, then [epsilon]c is a feasible flow on [RES.
The set of feasible directions in which to increase can be interpreted as the convex cone of feasible flows of an auxiliary network [RES.
feas](G) [subset or equal to] F (G) of feasible flows on G is said to be the polyhedron of feasible flows on G.
It is well-known and easy to see that feasible flows can be decomposed into cycles as follows.