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Dec
4
answered Why $\mathbb{N} \subset V_\omega$ and $Seq(\mathbb{N}) \subset V_\omega$?
Dec
4
answered A question about limit at infinity
Dec
4
answered Homomorphisms from $\mathbb{Z} \rightarrow S_3$.
Dec
4
answered Minimal Equivalence Relations
Dec
4
answered Proving if function is one to one
Dec
4
reviewed No Action Needed Word Problem Using elimination and/or substitution
Dec
4
reviewed No Action Needed Proving that two function coordinates of a parametric curve equals 1
Dec
4
reviewed No Action Needed How many 4 digit numbers can be made with exactly 2 different digits
Dec
4
comment Limit for $\lim _{n \to \infty}(n+2)^{2}\sin\frac{1}{n}$
Do you know that $\lim_{x\to0}\frac{\sin x}{x}=1$?
Dec
4
revised Limit for $\lim _{n \to \infty}(n+2)^{2}\sin\frac{1}{n}$
LaTeX finetuning
Dec
4
comment If a finite group $G$ is generated by two elements $x$ and $y$, then do $x$ and $xy$ also generate it?
@AWertheim Actually, the finiteness hypothesis is not needed as in the context of groups $\langle x,xy\rangle$ denotes the smallest group containing $x$ and $xy$, hence automatically contains $x^{-1}$.
Dec
4
comment Decide whether the following statements are true or false. If true, prove it. If false, provide a counterexample
Hint: What if $h$ is not onto (e.g. constant)?
Dec
4
awarded  trigonometry
Dec
3
reviewed Leave Open The gcd of $p+q$ and $p-q$ where $p4 and $q$ are distinct odd primes
Dec
3
reviewed Close How I can calculate $\sum_{n=0}^\infty{\frac{n}{3^n}}$?
Dec
2
reviewed Close Find a limit $\lim_{x \to - \infty} \left(\frac{4^{x+2}- 2\cdot3^{-x}}{4^{-x}+2\cdot3^{x+1}}\right)$
Dec
2
reviewed Close Countable product of complete metric spaces
Dec
2
comment Unknown maths topic, does the numbers hold
Is it safe to click that link?
Dec
2
answered Is it necessary to use the axiom of Regularity to prove the successor function being injective?
Dec
2
comment Is it necessary to use the axiom of Regularity to prove the successor function being injective?
@AndresCaicedo Well, as you need to say "since", it is a (very shallow) theorem.