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comment How to Identify a Quotient of a Given Free Group
I would probably try something like showing that you can write every element in the quotient uniquely in the form $b^n \cdot w(a,c)$ where $w(a,c)$ is a reduced word in $F(a,b)$, then you should be able to construct the isomorphism
Feb
6
revised Does a convex hull solution in 3 dimensions result in a minimum-area or maximum-volume solution?
tags did not seem relevan to the question
Feb
5
reviewed Approve How did the rule of addition come to be and why does it give the correct answer when compared empirically?
Feb
5
reviewed Close Find the dimensions spanned by the vectors
Feb
5
reviewed Close cokernel in the pointed set category $Set.$
Feb
5
revised Regarding part of proof of proposition: Any topological group $(G, \tau)$ which is a $T_1$-space is also a Hausdorff space.
Added tag, which should be helpful for people looking for such a question
Feb
5
reviewed Close Prove Complex Limits from first principle definition
Feb
4
comment Why every fundamental group isn't a trivial fundamental group?
I'm voting to close this question as off-topic because a simple google or wikipedia search would give examples. Not enough research effort.
Feb
4
revised How can I check whether the group $[16,13]$ in GAP with $3$ generators can be generated by $2$ elements?
added 571 characters in body
Feb
4
answered Which non-abelian finite groups have the property that every subgroup is normal?
Feb
4
answered How can I check whether the group $[16,13]$ in GAP with $3$ generators can be generated by $2$ elements?
Feb
3
revised Subgroups of finite index of $\mathbb Z/2\mathbb Z\times \mathbb Z$
expanded some sections, and improved some descriptions, correcteed some spelling grammar etc
Feb
2
reviewed Close Quaternions: Why is the angle $\frac{\theta}{2}$?
Feb
2
reviewed Leave Open Testing of hypothesis
Feb
2
reviewed Close How Should I prove the relation between these sets?
Feb
2
comment Alternating group on infinite sets
@K.622 Just as a remark, if you take $\operatorname{Alt} X$ to be the commutator subgroup group in the case of permutations without any support restrictions, then $\operatorname{Alt} X=\operatorname{Sym} X$, and in fact every element of $\operatorname{Sym} X$ is a commutator. That and some other interesting things about $\operatorname{Sym} X$ can be found in this paper. (In particular every cayley graph is bounded! It is open if there is a countable infinite group with that property)
Feb
2
reviewed Close Three random points in a cube
Feb
1
reviewed No Action Needed Geometric distribution achieves maximum entropy for given mean
Feb
1
reviewed Approve Show that $\frac{1}{1+k}=\frac{\frac{1}{k}}{1+\frac{1}{k}}\leq \ln(1+\frac{1}{k})\leq\frac{1}{k}$
Feb
1
reviewed Approve Probability of forming a even number