The length of a group of adjacent edges refers to the total length of the point-to-point distance between two adjacent edges. According to the public information related to the query, adjacent refers to being close to each other, two sides refer to edges in two directions, and a group of adjacent edges is a mathematical term, which refers to the total length of point-to-point distance of edges in two directions adjacent to each other. Mathematics is a subject that studies concepts such as quantity, structure, change, space and information. Mathematics is a universal means for human beings to strictly describe and deduce the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence, and mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics.