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Apr
2
comment Find the order of $Z(G)$.
Are $p$ and $q$ distinct?
Mar
20
answered If $\alpha$ and $\beta$ are ordinals then $\alpha \in \beta \Leftrightarrow \alpha \subsetneq \beta$
Mar
20
reviewed No Action Needed Integrating reciprocals of functions with known antiderivatives
Mar
19
comment Graph Theory Proofs (Don't understand the Concept).
Take a look at a maximum path in the graph (a path that can not be extended any further).
Mar
19
reviewed Reviewed Convergence of the recursive sequence $q_n = 1 - (1-pq_{n-1})^k$
Mar
19
reviewed Reject Prove that if Rank$(A)=n$, then Rank$(AB)=$Rank$(B)$
Mar
18
reviewed Reject M an R-module, where M is a commutative ring, if $M≅R/I$ for some ideal I of R, then $M$ is a cyclic R-module
Mar
18
revised Finding $\sum\frac{1}{2^n(n+1)}$
fixed latex
Mar
18
reviewed No Action Needed How to determine the dimension of a row space.
Mar
18
reviewed No Action Needed Comparison test, with one negative term?
Mar
18
awarded  Custodian
Mar
18
reviewed Approve Showing $ \sum _{n=2}^\infty \frac{(-1)^n}{\sqrt n +(-1)^n} $ is not convergent
Mar
17
reviewed Looks OK How to tell where parentheses go in functional notation?
Mar
17
reviewed No Action Needed generate large range function from smaller
Mar
17
reviewed No Action Needed Why did it take mathematicians so long to discover non-Euclidean geometry?
Mar
17
reviewed No Action Needed Maximal abelian subgroup of general linear groups
Mar
17
reviewed Reviewed Formulation of Linear Programming problem?
Mar
17
comment Modulus of $c^z$
No, your answer is correct. It just so happens that $|c^z|$ does not depend on $y$.
Mar
17
answered If $n-1$ is prime show it is relatively prime.
Mar
17
comment Suppose that $f$ is a differentiable function such that $f(g(x)) = x$ and $f^\prime(x) = 1+ [f(x)]^2$. Show that $g^\prime(x) = \frac{1}{1+x^2}$.
Exactly. It's a neat trick.