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Apr
20
answered Finding complex solution to $X^2 = A$
Apr
19
answered Linear Algebra: Direct Sum
Apr
19
answered Set difference of real numbers and rational numbers
Apr
19
answered Why is $\mathbb{R}/\mathbb{Z}$ isomorphic to the complex numbers of length one?
Apr
18
answered Linear algebra proof that AB = On with A invertible only if B = On
Apr
18
answered How to show that $\mathbb Q(\sqrt 2)$ is not field isomorphic to $\mathbb Q(\sqrt 3).$
Apr
5
asked Reference request: An example of a false conjecture with a very large number as the first counter example
Apr
5
answered how to find the root in $x^3-x^2+6x+24$?
Apr
5
answered Show that if $A^3=0$ but $A^2\ne0$, then $A^2v=0$ has a nontrivial solution
Apr
5
answered I already know that empty set is a basis for {0}. Then, can {0} be a basis for {0}??
Apr
3
answered Proving whether a squared function has double pole at $z_0$
Mar
21
answered Poisson distribution proof question
Mar
21
answered Find the coordinates of $P, Q, R$.
Jan
18
answered Expressing $x^5-2x^3+6x^2+1$ as a sum of powers of $x+2$
Jan
17
answered Vector cube question
Dec
28
answered How to prove that $\ln(x)<x$ for $x\to \infty$?
Nov
29
answered How to find the limit of an algebraic function
Nov
16
asked How to write a function that operates elementwise on a matrix?
Oct
26
asked How to read a contour plot?
Oct
26
asked Computing in Matlab, for a $n\times2$ matrix, for each row$\theta_{0}*\text{first element in row}+\theta_{1}*\text{second element in row}$