Rajesh D's user avatar
Rajesh D's user avatar
Rajesh D's user avatar
Rajesh D
  • Member for 13 years, 5 months
  • Last seen more than a month ago
17 votes
2 answers
4k views

Is this statement which relates the Fourier transform of a function to its singularities correct?

8 votes
4 answers
2k views

How to learn a continuous function?

7 votes
1 answer
562 views

Bounding the smallest eigenvalue of a matrix generated by a positive definite function

6 votes
1 answer
437 views

A problem on rate of decay of fill distance?

6 votes
1 answer
1k views

First eigenfunction of $p=3$-Laplacian of a square domain in $\Bbb R^2$ : reference for any work on this?

5 votes
1 answer
239 views

Are Pointwise conditions studied?, do they make sense?, do they have any applications?

5 votes
3 answers
1k views

Property/Relations using Fourier series/transform, which give complete information about all the jump singularities of a function.

5 votes
0 answers
409 views

Cusp point and straightness of a smooth curve.

5 votes
0 answers
219 views

Can we construct a computable sequence of trigonometric polynomials that converges pointwise to a given continuous function defined on the torus?

4 votes
1 answer
470 views

Asymptotic expansion of the inverse of a matrix valued function

4 votes
1 answer
481 views

What is the importance of convergence of variation of Fourier reconstruction to that of variation of the function?

4 votes
0 answers
82 views

Is there a fast way to compute the lowest eigenvalue of this symmetric PD matrix in this specific scenario?

3 votes
1 answer
165 views

A specific problem on : Can bounding the Sobolev norm, bound a higher derivative?

3 votes
1 answer
160 views

Does directional limits along any given direction, always exist for a function of bounded variation?

3 votes
2 answers
438 views

A problem on real valued functions in $\mathbb{R}^2$ with least variation

3 votes
1 answer
376 views

What is the mathematics behind the random experiment which produces the data with this strange property?

3 votes
0 answers
214 views

Is flatness of Wigner Ville Distribution of error function in Fourier Approximation possible? Is it required?

2 votes
0 answers
116 views

request for any expository works in pointwise convergence of double Fourier series and especially a paper by Hardy

2 votes
0 answers
92 views

For what functions does Nash inequality becomes equality?

2 votes
1 answer
1k views

How to compute inverse of sum of a unitary matrix and a full rank diagonal matrix?

2 votes
0 answers
193 views

Shattering with sinusoids

2 votes
0 answers
98 views

How to evaluate an interpolation method, in terms of converging to the underlying function, as data points go to infinity?

2 votes
0 answers
99 views

Closed form expression for this Fourier summation?

2 votes
0 answers
177 views

Bounding the condition number of a matrix associated with an even symmetric positive definite function

2 votes
0 answers
273 views

A question on convergence rates of Fourier series and strict convergence

2 votes
1 answer
421 views

Does $L^2$ convergence and convergence on a countable dense subset, together imply almost everywhere convergence?

1 vote
0 answers
918 views

A Question on certain Hilbert space of continuous functions, and a characteristic of convergence in it

1 vote
1 answer
112 views

Asymptotic behavior of a matrix equation and its eigenvalues

1 vote
0 answers
71 views

Reference request : Convergence of radial basis function interpolation or spline interpolation as points become dense, for a continuous function

1 vote
1 answer
233 views

Reference request for weak solutions of an Elliptic PDE