Factorization of rings problem

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SUMMARY

The discussion focuses on the factorization of the integer 20 within the ring of rational numbers extended by the square root of 2, denoted as Q(√2). The key equation to solve is x² - 2y² = 10, which is derived from the factorization process. A critical insight is that the related Diophantine equation x² - 2y² = 5 has no integer solutions, which complicates the factorization of 20. The participant expresses difficulty in solving the problem using brute force methods and seeks clarification on the factorization approach.

PREREQUISITES
  • Understanding of Diophantine equations
  • Familiarity with ring theory, specifically Q(√2)
  • Knowledge of factorization in algebra
  • Basic skills in solving quadratic equations
NEXT STEPS
  • Study the properties of Diophantine equations and their solutions
  • Learn about the structure of rings, particularly Q(√2)
  • Explore methods for factorization in algebraic number theory
  • Investigate the implications of non-solvable equations in integer contexts
USEFUL FOR

Mathematics students, particularly those studying algebraic number theory, educators teaching advanced algebra concepts, and anyone interested in the factorization of integers within specific rings.

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Homework Statement



in order to factorize 20 on the rings of [tex]Q( \sqrt 2)[/tex] i must solve

Homework Equations



[tex]x^{2} -2y^{2}=10[/tex]

The Attempt at a Solution



i do not know how to solve it, i have tried by brute force with calculator but can not get any response , the given hint is that [tex]x^{2} -2y^{2}=5[/tex] has no solution.
 
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I can only guess that you've factored 20 as 2*10, so why have you not factored 10 as 2*5?
 


according to the teacher, who put the exercise the diophantine equation

[tex]x^{2}-2y^{2}=5[/tex] has no solution on integers.
 

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