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 Apr 13 revised Is basis change ever useful in practical linear algebra? title/tags improvement Apr 13 suggested approved edit on Is basis change ever useful in practical linear algebra? Apr 13 revised Would an infinite random sequence of real numbers contain repetitions? title improvement Apr 13 comment Would an infinite random sequence of real numbers contain repetitions? infinite like countably infinite? uncountably infinite? which uncountable infinite then? Apr 13 suggested approved edit on Would an infinite random sequence of real numbers contain repetitions? Apr 6 comment Are Euclidean domains exactly the ones which we can define “mod” on? Actually the congruence relation can be defined on a lot of algebraic structures, for the quotient group $G / H$ (where $H \leq G$) is exactly the quotient set of the congruence relation $a mod b \iff ab^{-1} \in H$ Mar 9 awarded Yearling Mar 9 revised Explain why the following conjecture for $f(x)=[x]+(x-[x])^{[x]}$ is not correct? corrected typo Mar 9 comment Explain why the following conjecture for $f(x)=[x]+(x-[x])^{[x]}$ is not correct? What did you try to (dis)prove them? Mar 9 suggested approved edit on Explain why the following conjecture for $f(x)=[x]+(x-[x])^{[x]}$ is not correct? Mar 9 comment Linear dependent or independent Change your question to that and add what you've tried Mar 9 suggested rejected edit on Number of ways of shuffling cards such that $i^{th}$ card is not in the $i^{th}$ position Mar 9 comment Linear dependent or independent Welcome to math.SE: since you are new, I wanted to let you know a few things about the site. In order to get the best possible answers, it is helpful if you say in what context you encountered the problem, and what your thoughts on it are; this will prevent people from telling you things you already know, and help them give their answers at the right level. Mar 9 awarded Citizen Patrol Mar 9 answered Is it possible to define a monotonically increasing sequence on $\mathbb Z$ in such a way that the sequence is $\ldots,-3, -2, -1, 0, 1, 2, 3,\ldots$ Mar 9 comment Formula for the square root of a number? This algorithm provides an approximation, you should address this in your answer Feb 5 awarded Enthusiast Jan 22 comment $H,K$ be subgroups of a group $G$ such that $G$ is isomorphic with $H \times K$ ; then is $H$ normal in $G$ ? @DanielFischer you're right, I didn't see it Jan 21 answered $H,K$ be subgroups of a group $G$ such that $G$ is isomorphic with $H \times K$ ; then is $H$ normal in $G$ ? Jan 20 revised What's wrong with this use of Taylor's expansions? added 1 character in body