What are the four operations?
Why do addition and multiplication conform to the laws of exchange, association and distribution?
4 What is a geometric figure?
5 Four-color conjecture
6 Fermat's last theorem
7 Goldbach conjecture
8 P (polynomial algorithm) problem versus NP (non-polynomial algorithm) problem
9 geometric ruler drawing problem
10 cell conjecture
1 1 twin prime conjecture
12 Hodge conjecture
13 poincare conjecture
14 riemann hypothesis
15 There is a quality gap in the poplar mill.
Existence and Smoothness of 16 Navier-Stokes Equation
17 Birch and Swinnerton-Dyer's guess
18. White matter and Swinerton-Dell conjecture (Birch and Swinerton-Dell
Guess)
19 Naville-Stokes equation (Naville-Stokes equation)
20 P problem versus NP problem (p versus NP problem)
Compatibility of 2 1 arithmetic axioms
Irrational Numbers and Transcendental Numbers of Some Numbers
23 the impossibility of solving algebraic equations of degree 7 only with binary functions