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Apr
13
answered Different module on same set
Apr
13
comment Corollary to Maschke's Theorem.
More general question: math.stackexchange.com/q/661519/15416
Apr
13
answered Clarification: Suppose that $(v_1, \ldots ,v_n)$ is a basis of $V$ and $(w_1, \ldots ,w_n)$ is the basis of $W$ …
Apr
13
comment Global dimension of translation algebra
@CSA Seems like quite a couple of hours by now ... :-)
Apr
13
answered Suppose $\dim V=n$, $\dim W =m$, and $T\in L(V,W$)…
Apr
12
revised Does $B = \{x-2, x(x-2), x^2(x-2)\}$ span $\{p(x)\in P_3(\mathbb{R})|p(2) = 0\}$?
Added LaTeX to title
Apr
12
comment Show that every prime factor of $4t^2 + 1$ is equivalent to 1 modulo 4
@DanielFischer Here is another possible comment -> answer.
Apr
12
comment Solution to the following system of linear equations?
@AMPerrine Please consider converting your comment into an answer, so that this question gets removed from the unanswered tab. If you do so, it is helpful to post it to this chat room to make people aware of it (and attract some upvotes). For further reading upon the issue of too many unanswered questions, see here, here or here.
Apr
12
comment Prove $Ker(\phi) =(x^2 +1)$
@MrSelberg Please consider converting your comment into an answer, so that this question gets removed from the unanswered tab. If you do so, it is helpful to post it to this chat room to make people aware of it (and attract some upvotes). For further reading upon the issue of too many unanswered questions, see here, here or here.
Apr
12
comment Help with finding the basis of a polynomial vector space
@mathreadler Please consider converting your comment into an answer, so that this question gets removed from the unanswered tab. If you do so, it is helpful to post it to this chat room to make people aware of it (and attract some upvotes). For further reading upon the issue of too many unanswered questions, see here, here or here.
Apr
12
answered Finding basis for kernel and range
Apr
12
comment $R$ be a commutative ring which is a vector space over some field $F$ , is the map $f(x)=rx , \forall x \in R$ $F$- linear for every $r \in R$?
@MooS Please consider converting your comments into an answer, so that this question gets removed from the unanswered tab. If you do so, it is helpful to post it to this chat room to make people aware of it (and attract some upvotes). For further reading upon the issue of too many unanswered questions, see here, here or here.
Apr
12
comment Let $K$ a field with characteristic $p>0$. Show that $\{x \in K : x^{p^n} =x \}$ is a subfield.
@DanielFischer Please consider converting your comment into an answer, so that this question gets removed from the unanswered tab. If you do so, it is helpful to post it to this chat room to make people aware of it (and attract some upvotes). For further reading upon the issue of too many unanswered questions, see here, here or here.
Apr
12
comment Dual of polynomial ring
@egreg Please consider converting your comment into an answer, so that this question gets removed from the unanswered tab. If you do so, it is helpful to post it to this chat room to make people aware of it (and attract some upvotes). For further reading upon the issue of too many unanswered questions, see here, here or here.
Apr
11
reviewed Approve Integral Domains and Unique Factorisation Domains
Apr
11
comment Auslander-Reiten Quiver
As I already said, like this the question is too broad. Could you elaborate on how the algebras you have are given? Are they group algebras, are they given by a quiver (with or without relations)? Do you have a particular algebra in mind, that you are particularly interested in, maybe an example in a book which you don't understand?
Apr
11
answered Write $V=P_2(\mathbb{R})$ as a direct sum of $V=W_1\oplus W_2 \oplus W_3$
Apr
11
comment Auslander-Reiten theory
@DiegoHavez I can, but the comments to this question is not the right place to ask. May I suggest you ask a different question. But how to compute Auslander-Reiten quivers depends very much on the situation you are in, so it would be helpful to ask about a specific example or class of examples.
Apr
11
comment global dimension of bounded path algebra
After you ask a question here, if you get an acceptable answer, you should "accept" the answer by clicking the check mark ✓ next to it. This scores points for you and for the person who answered your question. You can find out more about accepting answers here: How do I accept an answer?, Why should we accept answers?.
Apr
11
comment $M\times N$ Doesn’t Have a Module Structure
@MartinBrandenburg Please consider converting your comment into an answer, so that this question gets removed from the unanswered tab. If you do so, it is helpful to post it to this chat room to make people aware of it (and attract some upvotes). For further reading upon the issue of too many unanswered questions, see here, here or here.