1, enumeration method: directly enumerate the coordinates or descriptions of points. For example, the point set {( 1, 2), (3,4) and (5,6)} represents a set containing three points, namely (1, 2), (3,4) and (5,6).

2. Set description method: describe the point set with mathematical symbols and conditions. Such as {(x, y) | x >; 0, y & gt0} represents the set of all points with x greater than 0 and y greater than 0.

3. Graphical representation: Use graphs or charts to represent a collection of points. For example, draw the position of points in the coordinate system, or use a scatter diagram to represent the distribution of points.