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 May19 asked Why having $ma+np=1$ implies that $m$ is the inverse? May17 asked A silly problem on critical points? May17 asked Barbeau's Polynomials: Quadratic Polynomials, 1.2.2 May17 asked Having the roots of a polynomial, is it possible to go back and find a polynomial that have exactly these roots? May14 asked If $n^2=ab$ and $\gcd(a,b)=1$, show that $a,b$ are not necessarily squares. May14 asked What are the benefits of using reduction map and lift instead of function and inverse image? May14 asked In a ring, if addition is commutative, does it implies that multiplication is commutative? May14 asked What is $R(k,l)$? May6 asked Why the $GCD$ of any two consecutive fibonnaci numbers is $1$? May6 asked Why can't we eliminate $t$? Apr30 asked Is there a problem in assuming that a point is the same thing of a vector? Apr28 asked Why $\frac{x}{\sqrt{x+1}-1}$ can be written as $\sqrt{x+1}+1$? Apr27 asked At which points the tangent lines of the function $y=\cos x$ are parallel to $-\frac{1}{2}x+1$? Apr20 asked How to show that \$0