A in n + B in n = C in n , where ABC n natural namba .
Let's take a row of natural numbers in level 1 . Every namber would be connected with any namber of row by low - arithmetic progression. There's namber with internal connection of being could make calculation in mathematical low , as it's theorem Fermi demands. In next level- 2 , is the same- connections in row between numbers, and exploring theorem Fermi demand is . But from level 3 and more, every namber of a row is spontaneous to another one , hence calculations in mathematical low are excluded . Theorem Fermi is proved.