Unsolved Problems

Showing 1-12 of 12 problems

HIL-012
Open

Hilbert's 12th Problem: Extension of Kronecker-Weber Theorem

Extend the Kronecker-Weber theorem on abelian extensions of the rationals to any base number field....

L5
Number Theory
345
19
HIL-016
Open

Hilbert's 16th Problem: Topology of Algebraic Curves and Limit Cycles

Determine the maximum number and relative positions of limit cycles for polynomial vector fields of degree $n$, and investigate the topology of real a...

L5
Geometry
432
24
HIL-006
Open

Hilbert's 6th Problem: Axiomatization of Physics

Develop a mathematical framework that axiomatizes physics, particularly mechanics, thermodynamics, and probability theory....

L5
Mathematical Physics
345
19
HIL-013
Open

Hilbert's 13th Problem: Seventh Degree Equations

Prove that the general equation of the seventh degree cannot be solved using functions of only two variables....

L4
Algebra
287
16
HIL-007
Open

Hilbert's 7th Problem: Transcendence of Certain Numbers

If $\alpha$ is algebraic and irrational, and $\beta$ is algebraic and irrational, is $\alpha^\beta$ transcendental?...

L4
Number Theory
321
18
HIL-009
Open

Hilbert's 9th Problem: Reciprocity Laws

Generalize the reciprocity law of number theory to arbitrary number fields....

L5
Number Theory
234
13
HIL-011
Open

Hilbert's 11th Problem: Quadratic Forms over Algebraic Number Fields

Extend the theory of quadratic forms with algebraic numerical coefficients....

L4
Number Theory
198
11
HIL-014
Open

Hilbert's 14th Problem: Finite Generation of Rings

Is the ring of invariants of a linear algebraic group acting on a polynomial ring always finitely generated?...

L4
Algebra
176
9
HIL-015
Open

Hilbert's 15th Problem: Schubert's Enumerative Calculus

Rigorously justify Schubert's enumerative geometry....

L4
Algebraic Geometry
267
15
HIL-017
Open

Hilbert's 17th Problem: Expression of Definite Forms

Can every non-negative rational function be expressed as a sum of squares of rational functions?...

L3
Algebra
198
11
HIL-018
Open

Hilbert's 18th Problem: Polyhedra and Space-Filling

Are there only finitely many essentially different space-filling convex polyhedra? Is there a polyhedron which tiles space but not in a lattice arrang...

L3
Geometry
289
16
PDE-001
Open

Navier-Stokes Existence and Smoothness

Do smooth solutions to Navier-Stokes equations exist globally in 3D? Or do finite-time singularities occur?...

L5
Partial Differential Equations
512
39