Hilbert questions

1. Cantor's problem of the cardinal number of the continuum


2. The compatibility of the arithmetical axioms


3. The equality of two volumes of two tetrahedra of equal bases and equal altitudes


4. Problem of the straight line as the shortest distance between two points


5. Lie's concept of a continuous group of transformations without the assumption of the differentiability of the functions defining the group


6. Mathematical treatment of the axioms of physics


7. Irrationality and transcendence of certain numbers


8. Problems of prime numbers


9. Proof of the most general law of reciprocity in any number field


10. Determination of the solvability of a diophantine equation


11. Quadratic forms with any algebraic numerical coefficients


12. Extension of Kroneker's theorem on abelian fields to any algebraic realm of rationality


13. Impossibility of the solution of the general equation of the 7-th degree by means of functions of only two arguments


14. Proof of the finiteness of certain complete systems of functions


15. Rigorous foundation of Schubert's enumerative calculus


16. Problem of the topology of algebraic curves and surfaces


17. Expression of definite forms by squares


18. Building up of space from congruent polyhedra


19. Are the solutions of regular problems in the calculus of variations always necessarily analytic?


20. The general problem of boundary values


21. Proof of the existence of linear differential equations having a prescribed monodromic group


22. Uniformization of analytic relations by means of automorphic functions


23. Further development of the methods of the calculus of variations