The traditional symbol for therefore is three dots placed into a triangle formation. Two dots are on the bottom and act as a base. Then one dot is centered above the other two. It forms a pyramid shape.
The symbol for therefore is: ∴. As you can see, it is a symbol characterized by a triangle composed of three dots, and is not readily available on a keyboard.
The symbol for therefore, in mathematics, consists of three dots, in a triangular shape, with each dot marking the corner of the triangle. It is used also used in shorthand writing.