Rick Sanchez C-666's user avatar
Rick Sanchez C-666's user avatar
Rick Sanchez C-666's user avatar
Rick Sanchez C-666
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4 votes

Value of $\sum_{n=1}^{\infty} \frac{\cos (n)}{n}$

4 votes

The convergence of the series $\sum\limits_{n=3}^\infty \frac {1} {n^2\ln(\ln(n))}$

3 votes

If $H^*$ is isomorphic with $H$ is H always a Hilbert space?

1 vote
Accepted

$(C^1(\mathbb T),\|\cdot\|) , \|f\|:=|f(0)|+\|f′\|_{L^2(\mathbb T)}$ is not a Banach space.

1 vote

How to solve $T(n) = 5T(\frac{n}{2}) + n^3 \log n$ using master method?

1 vote

Find $\lim\limits_{x \to 0} \frac{x^2}{\sin^2(x)}$

1 vote
Accepted

The Fourier Series of $f(x)= \int_{0}^{x} \log\sqrt{|\sin(\frac{t}{2})|} dt , -\pi < x < \pi $

1 vote

What is the complexity of $T(n) =3T((n-2)/2) + n^2$?

0 votes

Why is $T(n)=2T\left(\frac{n}{2}\right) + n\log(n)$ time complexity is $Θ\big( n\log^2(n) \big) $?

0 votes

How do you draw the graph of $f(x)=e^{x-[x]}$ where $[x]$ denotes greatest integer function?