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2017-12-04 10:08:48 +0200 | asked a question | How to visualise complex functions on a disk? Let $f$ be a function on the unit disk $\mathbb{D}$. I want to look at the images of $f(\mathbb{D})$? How to do this? How to see the contours of $|f(z)|$? How to see the argument (if possible)? |

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2017-08-14 19:13:27 +0200 | marked best answer | multivariate polynomial ring over complex numbers I want to factorize bivariate polynomials over C. For single variable case we do this as follow: How to do this for multivariate case ? |

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2016-11-15 09:41:15 +0200 | asked a question | Trying to find prime factorization of ideals in number fields Let $L=\mathbb{Q}(\sqrt{-5}, i)$ and $K=\mathbb{Q}(\sqrt{-5})$. Let $O_K$ and $O_L$ be the rings of algebraic integers of $K$ and $L$. It can be checked that $$2O_K=\langle 2, \sqrt{-5}+1\rangle^2 $$ I want to find the factorization of the ideal $\langle 2, \sqrt{-5}+1\rangle O_L$ in $O_L$ ? The problem I am having is this. I don't know the syntax for the ideal generated by $\langle 2, \sqrt{-5}+1\rangle O_L$. What to do ? |

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