A convex cone is a set 
such that 
for all 
and all nonnegative scalars 
and 
.
Convex Cone
See also
Cone, Cone Set, Hyperbolicity ConeExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Convex Cone." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/ConvexCone.html