• Alias: c*. • Infix and prefix operator. • xy is by default interpreted as CircleTimes[x,y]. • Used in mathematics for various operations related to multiplication, such as direct or tensor products. • Also sometimes used to indicate a vector pointing into the page. • See also: \[CircleDot] , \[Times] , \[Cross] , \[Wedge] , \[CirclePlus] .