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Alberto Debernardi
  • Member for 8 years, 2 months
  • Last seen more than a month ago
  • Sabadell
4 votes
1 answer
121 views

How to prove that $\frac{\log(1+a/x)}{\log(1+1/x)}$ is increasing, for $a\geq 1$?

4 votes
0 answers
101 views

Lip $\alpha$ trigonometric series

2 votes
1 answer
1k views

Problem with a trigonometric function: $\arctan ( \sin x /(1-\cos x))$

2 votes
2 answers
147 views

Asymptotic behaviour of a double sum

1 vote
2 answers
448 views

Is the Fourier transform of a continuous and compactly supported function summable?

1 vote
0 answers
55 views

Is there any mistake? Proof related to the Poisson summation formula.

1 vote
1 answer
88 views

Property of summable sequences

1 vote
1 answer
38 views

If $f:\mathbb{R}^2\to X$, how do we call $f_{x_0}(y) =f(x_0,y)$ as a function of one variable?

1 vote
0 answers
49 views

Finding the inverse of an operator (in closed form)

1 vote
0 answers
159 views

About the rank of (sub) matrices whose entries are roots of unity