Reputation
447
Top tag
Next privilege 500 Rep.
Access review queues
Badges
3 10
Newest
 Yearling
Impact
~15k people reached

  • 0 posts edited
  • 0 helpful flags
  • 50 votes cast
Jun
23
comment Clarification about Asymptotic comparison test for Improper integrals
you're right! many thanks!
Jun
23
asked Clarification about Asymptotic comparison test for Improper integrals
Jun
23
comment Is this function differentiable in $(1,-1)$?
@Siminore thanks a lot for your help! :)
Jun
23
comment Is this function differentiable in $(1,-1)$?
@Siminore with "test on partial derivatives" do you mean "check if they are continuous"?
Jun
23
comment Is this function differentiable in $(1,-1)$?
@Chilango I always forget to use them! ;)
Jun
23
comment Is this function differentiable in $(1,-1)$?
@Siminore yes! I have obtained the same results. I have recheck the limit: it exists and is equal to 0... I made an algebra mistake... :( Anyway, can I say that the the function is differenziable in (1,-1) because there the partial derivatives are continuous? they are quotients of continuous functions, aren't they?
Jun
23
comment Is this function differentiable in $(1,-1)$?
@Siminore I'll recheck it....
Jun
23
asked Is this function differentiable in $(1,-1)$?
Jun
23
accepted $\sum 0$: does it converge or diverge?
Jun
23
asked $\sum 0$: does it converge or diverge?
Jun
19
comment Theorem about sum/product/quotient/composition of differentiable functions
@YvesDaoust so, $x^2+y^2\neq k \pi$? I have edited the question, please, read it.. thanks!
Jun
19
revised Theorem about sum/product/quotient/composition of differentiable functions
added 491 characters in body
Jun
19
comment Theorem about sum/product/quotient/composition of differentiable functions
@aev I'm sorry, I haven't understood.. what do you mean?
Jun
19
asked Theorem about sum/product/quotient/composition of differentiable functions
Jun
17
accepted Convergence of $\int_{2}^{+\infty} \frac1{x \ln^\alpha x}dx$
Jun
17
comment Convergence of $\int_{2}^{+\infty} \frac1{x \ln^\alpha x}dx$
great!!! I was getting crazyl!!! :D It converges for $\alpha>1$! what do you have to recheck?
Jun
17
asked Convergence of $\int_{2}^{+\infty} \frac1{x \ln^\alpha x}dx$
Jun
16
asked Integral of $\sin (x^3)dx$
Jun
16
comment Clarifications about the correct way to solve exercises (continuity, partial derivatives, differentiability)
Just a little clarification. They must be 0 because the limits that you have calculated are equal to zero or because $\bar f (1,0)=0$ and, if I derive it respect with x and y, I obtain 0?
Jun
16
comment Clarifications about the correct way to solve exercises (continuity, partial derivatives, differentiability)
and, if the partials are continuos, the limits must be equal to zero, aren't they?