Reputation
2,052
Next privilege 2,500 Rep.
Create tag synonyms
Badges
2 7 25
Newest
 Custodian
Impact
~21k people reached

Mar
2
reviewed Approve Prove that there is an increasing sequence $\{a_n\}$ of points in $A$ such that $\lim a_n = \sup A$.
Mar
1
comment Evaluate $\sum_{n=1}^\infty (-1)^n/(n^4)$
This has been asked here: math.stackexchange.com/questions/1169861/…
Mar
1
reviewed Approve Complex Number Maths
Mar
1
answered Properties of resolvent operators
Feb
26
reviewed Approve Formal proof of a very simple fact.
Feb
24
revised Multiplication of absolutely continuous function and function of bounded variation
Added Tex.
Feb
24
reviewed Approve Is $f(x)=\frac{\cos \left(x\right)}{1+x^2}$ uniformly continuous?
Feb
23
reviewed Approve Power series divergence (real analysis)
Feb
23
reviewed No Action Needed Calculus problem about equality of series and integral
Feb
19
reviewed Approve exotic smooth structures
Feb
19
awarded  Custodian
Feb
19
reviewed Looks OK What is the limit of $\lim_{x\to -\infty}\frac{\sqrt{x^2}}{x}$?
Feb
19
reviewed Approve Let $x = (11, 2)^T$ . Find both reflection matrices $M$ such that $Mx$ is a multiple of $e_1$.
Feb
17
awarded  Custodian
Feb
17
reviewed Approve Analysis question about density of rationals
Feb
16
comment converge absolutely/conditionally : (cos(npi)) / ((n+1)ln(n+1))?
You're welcome!
Feb
16
comment converge absolutely/conditionally : (cos(npi)) / ((n+1)ln(n+1))?
Try $u=\ln(x+1)$.
Feb
16
answered converge absolutely/conditionally : (cos(npi)) / ((n+1)ln(n+1))?
Feb
16
comment Is there a function that is differentiable but not integrable?
@Robert The Riemann integral is defined on the closed interval, I'm sure you will see this if you look in your textbook. This is also discussed on this site, see for instance: math.stackexchange.com/questions/461459/…
Feb
16
comment Is there a function that is differentiable but not integrable?
To be clear, I refer to your last statement, that the function is Riemann integrable.