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3h
reviewed Close Determine whether a polynomial is primitive in GF(2)[x]
3h
comment Suppose that $H$ is a subgroup of $G$ and that $h$ and $h'$ are in $H$. If $h$ and $h'$ are conjugates in $G$, are they also conjugates in $H$?
(+1) for actually showing an example.
5h
comment When to use Integral Substitution?
@problematic: I added more to my answer.
5h
revised When to use Integral Substitution?
added 742 characters in body
5h
comment When to use Integral Substitution?
@YvesDaoust: I think you want $g(x) = 1 +e^x$.
5h
answered When to use Integral Substitution?
Oct
21
reviewed Close Complex Fourier coefficients and series
Oct
21
reviewed Leave Open Probability Distribution Function?
Oct
21
reviewed Close Number of chains having k subsets
Oct
18
reviewed Leave Open Distribution of things on one row.
Oct
18
reviewed Close Elementary Conditional Probability Question
Oct
18
reviewed Close How to wirte this sentence into Predicate
Oct
18
reviewed Close How to prove $l^p$ is separable?
Oct
18
reviewed Leave Open proof that inf(-A)=-sup(A)
Oct
18
reviewed Close graph of connected set
Oct
15
answered For small $x$, one has $\ln(1+x)=x$?
Oct
15
awarded  Good Answer
Oct
13
answered Is this induction proof correct?
Oct
12
awarded  Nice Answer
Oct
11
comment Calculating limit in parts. Why possible?
@CareBear: I guess my point is that the two sides of the equality are equal. It doesn't necessarily matter how you get that they are equal. When you have a rule saying that you can "do something" all it means is that two expressions are equal. So in this case you can "evaluate" by taking the limit of $\frac{f(x) - f(1)}{x-1}$ as $x$ approaches $1$. My argument, of course, doesn't extend to other cases. The comment above for the other answer suggests that one, in fact, doesn't have a general rule for this.