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Salvattore
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4
How can I transform the fuction $x=y$ under the complex function $f(z)=z^2+z$?
Nov 15, 2013
4
Is $\mathbb{Z}_4 \times \mathbb{Z}_ {12} \times \mathbb{Z}_9$ cyclic?
May 20, 2016
3
Why $0$ is the accumulation point of the set $\Omega=\{\frac{1}{n}+\frac{i^n}{n} \mid n\in N / \{0\} \}$ ??
Nov 9, 2013
3
Show that the function $f(z)=1/z$ transforms a circle centered at the origin in the $xy$ plane in a circle centered at the origin in the $uv$ plane
Nov 15, 2013
2
Find all couple $(x,y)$ for satisfy $\frac{x+iy}{x-iy}=(x-iy)$
Oct 8, 2013
2
Prove that every nonempty set of real numbers that is bounded from below has an infimum
Oct 15, 2013
2
Prove that the discrete time martingale can be represented by $E (Y_{n +1} \mid F_n) = 0$ if $Y_{n +1} = X_{n +1}-X_n$, for $n = 0,1, \ldots $
Aug 1, 2014
2
Counting problem, given a finite field and number variables
Aug 24, 2014
2
Let $X$ be the value of the first die and $Y$ the sum of the two dice. Find $E(X / Y)$ [closed]
Aug 25, 2014
2
Future Value and Present Value of a General Annuity Due
Apr 20, 2016