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number > complex number > quadratic integer > Fermat's theorem on sums of two squares

number > number theory > algebraic number theory > quadratic integer > Fermat's theorem on sums of two squares

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geometry > algebraic geometry > Diophantine geometry > Diophantine equation > Fermat's theorem on sums of two squares

number > number theory > Diophantine geometry > Diophantine equation > Fermat's theorem on sums of two squares

... > mathematical analysis > function > elementary function > polynomial > polynomial equation > Diophantine equation > Fermat's theorem on sums of two squares

algebra > polynomial > polynomial equation > Diophantine equation > Fermat's theorem on sums of two squares

mathematical analysis > equation > polynomial equation > Diophantine equation > Fermat's theorem on sums of two squares

number > number theory > analytic number theory > additive number theory > Fermat's theorem on sums of two squares