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Formula for number of solutions to $x^4+y^4=1$, from Ireland and Rosen #8.18.

number-theory elementary-number-theory algebraic-number-theory finite-fields characters asked Feb 14 at 22:22

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Is finite group theory still a fruitful area of research?

group-theory soft-question finite-groups asked Oct 16 '12 at 19:52

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Are there any examples of rings $R$ such that $\mathrm{End}(R,+,0)\not\cong R$?

abstract-algebra ring-theory asked Aug 12 '12 at 15:48

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When is $\mathbb{F}_p[x]/(x^2-2)\simeq\mathbb{F}_p[x]/(x^2-3)$ for small primes?

polynomials ring-theory field-theory asked Jul 11 '12 at 7:11

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What is the importance of Leviticus 19:19?

mosaic-law leviticus asked Feb 16 '12 at 9:53

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For a ring $\{0,1,c\}$, does $c^2=1$?

ring-theory asked Sep 16 '12 at 4:56

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