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72 Answers

Votes Activity Newest
3
Why linear independency of solutions of ordinary differential equations or functions is important?
2 days ago
3
Are all finite simple groups essentially permutation groups?
2 days ago
1
Quotient rings link to first isomorphism theorem
Nov 22 '19 at 17:34
3
Is $d(x,y)=|x^3-y^3|$ metric on $\mathbb R$?
Nov 22 '19 at 17:05
0
Why are ideals specifically additive subgroups?
Nov 28 '18 at 5:58
5
How does a Lie algebra transform under a diffeomorphism?
Nov 24 '18 at 6:28
4
Is it true that $F$ is a field if and only if $F[X]$ is an Euclidean domain?
Nov 24 '18 at 5:05
6
Why do similar matrices represent the same linear transformation?
Nov 24 '18 at 1:03
1
Find the determinant of $N \times N$ matrix
Nov 24 '18 at 0:19
0
How Do I Find the Exact solution after using the Finite Difference Method?
Nov 23 '18 at 0:44
1
How to show that $\text{Hom}_R(A\times B ,M)\cong \text{Hom}_R(A,M)\times \text{Hom}_R(B,M) $ when $A, B$, and $M$ are $R$-modules?
Nov 21 '18 at 19:38
1
Proof about an endomorphism of a finite-dimensional vector space
Nov 21 '18 at 18:03
1
If V and W are linear subspaces of $R^n$, then V transversal W means just $V + W = R^n$
Nov 21 '18 at 17:32
1
Is there a nice way to use the group isomorphism theorems in this proof?
Nov 21 '18 at 6:03
0
Which of the following are vector subspaces of $\mathbb{R}^2$?
Nov 21 '18 at 5:09
2
If $M/N\cong M$, can we conclude that $N=0$?
Nov 21 '18 at 3:56
2
Why does the “$i$” in $f=u+vi$ not affect the measurability of $f$?
Nov 21 '18 at 3:51
3
$\mathbb{F}_2[X]/(S) \cong \mathbb{F}_4 $
Nov 21 '18 at 3:32
2
Prime subfield when $ch(F) = 0$; shouldn't it be prime subring isomorphic to $\mathbb{Z}$?
Nov 21 '18 at 2:41
1
Find linear transformation whose kernel is given
Nov 20 '18 at 20:47
2
Given a field extension $K\subset M$ with algebraic elements in x,y: Show that g(x,y)=0 for any g
Nov 20 '18 at 19:37
0
Why aren't repeating decimals irrational but something like $\pi$ is?
Jun 6 '18 at 3:37
1
Topology on a finite set with closed singletons is discrete
Mar 8 '17 at 21:21
0
On Riesz Representation and containment of the $L^p$ spaces when $E$ has finite measure
Feb 27 '17 at 17:02
4
Why a group $G$ can form a 2-category?
Feb 26 '17 at 20:43
0
Isomorphic rings sharing the same properties
Feb 26 '17 at 20:19
0
all linear transformations from $\mathbb Z_2^2$ to $\mathbb Z_2^2$
Dec 28 '16 at 21:36
1
What is beyond a volume in Geometry?
Dec 25 '16 at 2:03
8
What is the proper usage of “identically zero”?
Dec 24 '16 at 4:48
37
Does having a finite number of generators, each having finite order, imply that the group is finite?
Dec 24 '16 at 4:05
1
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