7h
comment The injectivity of $f\mapsto f\circ v$ on $\hom(M'',N)$ implies that $v$ is surjective
Have a look at the question I linked to. It has the answer to your question.
7h
comment The injectivity of $f\mapsto f\circ v$ on $\hom(M'',N)$ implies that $v$ is surjective
possible duplicate of Atiyah & Macdonald Prop. 2.9
Aug
10
comment How to compute $\int \frac{x}{(x^2-4x+8)^2} \mathrm dx$?
@anorton Let's keep it civil, shall we? All what I'm saying is that the answers presented here are merely special cases of a general solution we already have on this site. The reason we have a generalized answer is precisely to avoid a proliferation of special cases that don't add value. Given how straightforward it is to apply the general solution to this case, I doubt that there is value in waiting for new methods.
Aug
10
comment How to compute $\int \frac{x}{(x^2-4x+8)^2} \mathrm dx$?
@anorton If there is a method not mentioned in the general answer, it should be added there.
Aug
10
comment How to compute $\int \frac{x}{(x^2-4x+8)^2} \mathrm dx$?
@anorton Do you have an answer to the OP's second question that isn't a subset of the generalized answered posted by Peter? We have generalized answers for a reason.
Aug
10
comment How to compute $\int \frac{x}{(x^2-4x+8)^2} \mathrm dx$?
@amWhy The OP asked for a more general case. The answers below don't answer that. I think it is a duplicate.
Aug
10
awarded Good Answer
Aug
9
reviewed Approve suggested edit on If $A\Delta B=C\Delta D$, must $A\Delta C=B\Delta D$?
Aug
9
comment If $A\Delta B=C\Delta D$, must $A\Delta C=B\Delta D$?
Your English is OK. Where does this question come from? Do you have any thoughts on how to approach it?
Aug
5
revised Any module is the colimit of its finitely generated submodules.
deleted 34 characters in body
Aug
3
awarded Nice Answer
Aug
3
comment What exactly does $\langle a,b \rangle$ mean? Where a and b are elements of a group G?
possible duplicate of Notation question: Group generated by two elements?
Aug
3
answered prove that $\int_{0}^{1}|f(x)|dx \leq \int_{0}^{1}|f'(x)|dx$
Aug
3
comment prove that $\int_{0}^{1}|f(x)|dx \leq \int_{0}^{1}|f'(x)|dx$
Did you try using the fundamental theorem of Calculus?
Aug
3
awarded Civic Duty
Aug
3
comment Under what circumstances is it appropriate to delete a question that has received a good answer?
@Asaf True, but the same applies to recent undeletions and delete votes, so there is no imbalance here.
Aug
2
comment Under what circumstances is it appropriate to delete a question that has received a good answer?
@Gerry Yes. I've just checked the list of recent deletions and found several questions deleted by the community user.
Aug
2
comment Under what circumstances is it appropriate to delete a question that has received a good answer?
@GerryMyerson Anyone with 10K reputation can view recent close and delete votes. It's under review > tools.
Aug
2
comment Can the boundary of a subset be open?
While this is true, the boundary can be open and closed at the same time. These are not mutually exclusive properties.
Jul
29
comment Programming string in math
@jcubic I don't understand the question. What do you mean by language theory? If you're looking for the analogue of string in formal languages, then it's called a word.
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