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Jun
28
comment Find whether $f(n) = o(g(n))$ or $g(n) = o(f(n))$
Little o implies big O
Jun
28
comment Can we determine uniform continuity from graphs?
(nitpick) Do you need to include contiuity in your first condition?
Jun
28
comment What can we conclude if $A$ and $B$ are events such that $p(A) + p(B) - p(A \cap B) = p(A)$?
You have information about $A \cap B$ and $A \cup B$. Do you know an expression for $A \setminus B$ or $B \setminus A$ in terms of these? (I presume you mean setminus rather than quotient).
Jun
27
comment Inverting the differential operator $D^2-3D+2$
Well, how did you arrive at that answer? If you know what the answer is then you must want us to correct your reasoning, which you haven't provided.
Jun
27
answered When do variables cancel out?
Jun
27
revised How to remember/rederive the isomorphisms from the half planes to the unit disc
added 897 characters in body
Jun
27
answered How to remember/rederive the isomorphisms from the half planes to the unit disc
Jun
26
revised Solving $\int \frac{dx}{(x^2 + y^2 + z^2)^{\frac{3}{2}}}$
deleted 28 characters in body
Jun
26
answered Solving $\int \frac{dx}{(x^2 + y^2 + z^2)^{\frac{3}{2}}}$
Jun
26
answered Name of a graph that shows various strengths
Jun
26
comment Can one differentiate a series after taking its limit?
@VafaKhalighi I'm not angry, and I did not mean to insult you (I apologise) - what I was trying to make clear was if you are trying to prove something, and you make an assumption which leads to a false statement, then your immediate reaction should be to say that an assumption you made was incorrect.
Jun
26
comment Can one differentiate a series after taking its limit?
Do you not see that the ridiculous conclusion you've drawn shows that you can't interchange these things in general??
Jun
26
comment Proof, if $f(x) = g(x)$ then $\int f(x)=\int g(x)$.
Presumably you are using the Riemann definition of the integral. When you make a partition of $[a,b]$, consider the subinterval which contains $\alpha$ separately to the rest of the partition.
Jun
25
comment How to estimate the number of decimal places required for a division?
I don't think there is a simpler way. Good work though.
Jun
25
comment If $\pi$ is not algebraic number then : is $\pi ^{n}$ algebraic number for $n >1$?
Just a curiosity: What do you mean by $\pi^{2}=10$?
Jun
25
comment Find parameter m if equation admits three distinct real solutions
Drawing the graph is a very good idea, and I don't know why you wouldn't want to do it. You can prove the statement above without drawing the graph by using Rolle's Theorem and the Intermediate Value Theorem. Why don't you want to draw the graph?
Jun
25
answered Find parameter m if equation admits three distinct real solutions
Jun
24
revised How to determine non trivial homomorphisms
added 439 characters in body
Jun
24
answered How to determine non trivial homomorphisms
Jun
24
comment How to determine non trivial homomorphisms
I don't think you understand. The truth is there are many techniques for finding these kinds of maps, and it's one of those problems that doesn't have a cut-and-paste answer to it. If you asked how to find a homomorphism between two particular groups, or even two classes of groups, then it might be reasonable, but really there are just too many possible answers for someone to be able to answer you concisely.