Gauss formula of high number: g = ad * i. Gauss theorem is also called Gauss flux theory, or divergence theorem, Gauss divergence theorem, Gauss-Ostrogradski formula, Auschwitz theorem or Gauss formula (usually Gauss theorem refers to this theorem, and there are other theorems with the same name).

Advanced mathematics generally refers to advanced mathematics (the name of the basic subject), which refers to a part of the complex mathematical objects and methods compared with elementary mathematics. Broadly speaking, all mathematics except elementary mathematics is advanced mathematics, and some call algebra, geometry, simple set theory and logic in middle school intermediate mathematics, which is the transition between elementary mathematics in primary and secondary schools and advanced mathematics in universities.