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Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
May
25
comment Application of weak $L^p$ estimate besides for proving boundedness of some linear operator
Thank you for your reference.
May
24
comment Application of weak $L^p$ estimate besides for proving boundedness of some linear operator
May I get the references for your argument (especially about Hardy-Littlewood Maximal operator)? In addition, can the density be applied for fractional integral operator?
May
23
asked Relation between fractional integral operator and solution of poisson equation
May
23
asked Application of weak $L^p$ estimate besides for proving boundedness of some linear operator
May
21
accepted existence of the solution of Neumann problem in $\mathbb{R}^3$
May
11
asked existence of the solution of Neumann problem in $\mathbb{R}^3$
May
11
accepted A function $f:\mathbb{R} \to \mathbb{R}$ with infinite norm but finite weak seminorm
Apr
18
answered Is there a difference between limit and “two-sided limit”?
Apr
18
accepted Two variable function with four different stationary points
Apr
17
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