1, Gauss theorem, one of the basic equations of electrostatic field, which gives the relationship between the area fraction of electric field intensity on any closed surface and the total amount of electricity enclosed in the closed surface.

2. De Moivre was founded by French mathematician De Moivre, and this theorem has had a far-reaching influence in the field of complex numbers.

3. euler theorem refers to euler theorem's net output distribution theorem in western economics, which means that under the condition of perfect competition, assuming that the long-term middle income remains unchanged, all products are just enough to be distributed to all factors.

4. Fermat's theorem means that it is impossible to divide a cubic degree by the sum of two cubic degrees, a quartic power by the sum of two quartic powers, and it is even more impossible to generally divide a power higher than quadratic by the sum of two powers of the same degree.