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Hilbert's seventh problem is one of David Hilbert's list of open mathematical problems posed in 1900. It concerns the irrationality and transcendence of certain numbers ( Irrationalität und Transzendenz bestimmter Zahlen ).
Hilbert's problems ranged greatly in topic and precision. Some of them, like the 3rd problem, which was the first to be solved, or the 8th problem (the Riemann hypothesis), which still remains unresolved, were presented precisely enough to enable a clear affirmative or negative answer.
Hilbert's second problem; Hilbert's third problem; Hilbert's fourth problem; Hilbert's fifth problem; No small subgroup; Hilbert's sixth problem; Hilbert's seventh problem; Hilbert's eighth problem; Hilbert's ninth problem; Hilbert's tenth problem; Hilbert's eleventh problem; Hilbert's twelfth problem; Hilbert's thirteenth problem; Hilbert's ...
Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.
Hilbert's thirteenth problem is one of the 23 Hilbert problems set out in a celebrated list compiled in 1900 by David Hilbert. It entails proving whether a solution exists for all 7th-degree equations using algebraic (variant: continuous ) functions of two arguments .
It is defined as a deductive system that generates theorems from axioms and inference rules, [3] [4] [5] especially if the only inference rule is modus ponens. [6] [7] Every Hilbert system is an axiomatic system, which is used by many authors as a sole less specific term to declare their Hilbert systems, [8] [9] [10] without mentioning any more ...
Hilbert's proof did not exhibit any explicit counterexample: only in 1967 the first explicit counterexample was constructed by Motzkin. [3] Furthermore, if the polynomial has a degree 2 d greater than two, there are significantly many more non-negative polynomials that cannot be expressed as sums of squares.
The 7th edition was the last to appear in Hilbert's lifetime. In the Preface of this edition Hilbert wrote: "The present Seventh Edition of my book Foundations of Geometry brings considerable improvements and additions to the previous edition, partly from my subsequent lectures on this subject and partly from improvements made in the meantime ...