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15h
answered Is there a difference between limit and “two-sided limit”?
15h
accepted Two variable function with four different stationary points
1d
comment Two variable function with four different stationary points
effective diet pill, Thank you for your example. I hope that I can find simpler example. I think that we can ask, what happen the stationary point if $D=0$ just like $(0,0)$ is the saddle point of $f(x,y)=x^3-y^3$?
Apr
12
comment Determine the number of zeros in the first quadrant
Just using the quadratic formula and $z=\frac{1}{2}-\sqrt{3}i$ is on the second quadrant
Apr
12
answered Determine the number of zeros in the first quadrant
Apr
12
comment Two variable function with four different stationary points
Thanks @Ian Coley
Apr
12
comment Two variable function with four different stationary points
Sorry, it is my typo
Apr
12
asked Two variable function with four different stationary points
Mar
18
comment A function $f:\mathbb{R} \to \mathbb{R}$ with infinite norm but finite weak seminorm
@127.0.9.6. Well, after checking again, we have to restrict $q\geq 1$.
Mar
18
comment A function $f:\mathbb{R} \to \mathbb{R}$ with infinite norm but finite weak seminorm
I really thank you for your help. Could you give the references related to this subject? If it is possible, how do I contact you? This problem related to my thesis. I have added the Dirac delta function that I mentioned as my example. May I modify your example and add it if you give your permission? If I do so, how do I give your credit as personal communication?
Mar
14
asked A function $f:\mathbb{R} \to \mathbb{R}$ with infinite norm but finite weak seminorm
Feb
9
revised Solution set of inequalities in $\mathbb{R}^6$
Edit the title
Feb
9
asked Solution set of inequalities in $\mathbb{R}^6$
Feb
9
accepted Largest singular value of non square matrix
Jan
29
asked Largest singular value of non square matrix
Jan
29
accepted Inequalities of two variables
Jan
23
asked Inequalities of two variables
Dec
4
awarded  Popular Question
Nov
21
awarded  Popular Question
Oct
30
awarded  Popular Question