Derek Luna

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elementary-number-theory

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Inequality proof by induction

Nov 20, 2020

If $A$ and $B$ are sets, do $\mathcal{P}(A - B)$ and $\mathcal{P}(A) - \mathcal{P}(B)$ equal?

Jan 9, 2021

Find all the integer solutions of $x^2-4y^2=1$

Jan 5, 2021

How to prove that, if two numbers are equal $\mod2$ and$\mod3$ ,they are equal$\mod 6 $?

Nov 9, 2020

If the square of an irrational number r is irrational, can it be equal to a + br, where both a and b are rational

Nov 10, 2020

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Is this a bijection from $[0,1)$ to $(0,1)$?

Aug 2, 2019

Baby Rudin Chapter $4$ Exercise $1$

Jul 15, 2020

Prove that if $x$ is element of the group G then $H = \lbrace x^n : n \in Z\rbrace$ is a subgroup of $G$.

May 12, 2019

Rigor in elementary number theory

Jul 3, 2019

Relatively prime integers and order of an integer

Jul 4, 2019

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