Hagen von Eitzen
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 Aug23 answered Intuitive explanation for how could there be “more” irrational numbers than rational? Aug23 answered Number of isoceles triangles Aug23 comment Minimal polynomial of a matrix product @Peregrino because $Ax$ is a multiple of $U$ for all $x$ Aug23 comment Is there any kind of irrational number wich does not contain digit 9? One example of a transcendental number is the Liouville number $\sum_{n=1}^\infty 10^{-n!}$, which has only $0$ and $1$ digits. Aug23 answered property of real number system Aug23 answered how to find out any digit of any irrational number? Aug22 comment I want to show that ker f is a normal subgroup of some group $X$ Actually, "is the kernel of some homomorphism" is one of several possible definitions of "normal subgroup". Aug22 comment Paying less interest rate in credit card Ah, in that case, essentially paying 300 to A and transferring 300 from A to B is the same as paying 300 to B, hence the prefered strategy according to the interest rates. Aug22 comment Paying less interest rate in credit card By the way, when you say "transfer from B to A", do you mean transfer money, that is increase your debt on card B and decreas your debt on card A, or transfer debt, that is decrease your debt on B and increase your debt on A? If the first is the case, your bank would only allow you to worsen your situation, how kind of them Aug22 comment Paying less interest rate in credit card Well, that's differnt from what you stated above. The rule of thumb still holds: Get rid of credit on $B$ as fast as possible. Aug22 comment Paying less interest rate in credit card Why not pay $\$300$on card$B$inestead of putting it on$A$and then transfering it? The rule of thumb is "money goes to the highest interest". So you should simply never have a credit on$B$, unless$A$is maxed out. Aug22 answered Birds Problem-Brain Teaser- Amazon interview question Aug22 answered n+1 vectors in$\mathbb{R}^n$cannot be linearly independent Aug22 answered Completeness condition in Gödel first incompleteness theorem superflous Aug22 revised Completeness condition in Gödel first incompleteness theorem superflous edited title Aug22 comment Find the sum of all real solutions for$x$to the equation$(x^2 + 2x + 3)^{(x^2+2x+3)^{(x^2+2x+3)}} = 2012.$@FlybyNight Well, LaTeX allows for$a^{b^c}$and${a^b}^c$, so to talk about the standard indeed requires a good eye :) Aug22 answered If$f$is a continuous periodic function with irrational period and if$\sum_n\frac{|f(n)|}{n}<\infty$, then$f$is identically zero. Aug22 answered solutions poker texas hold'em Aug22 revised How to find the angle between vectors which is not necessarily the smallest angle added 634 characters in body Aug22 comment How to find the angle between vectors which is not necessarily the smallest angle @vckngs7 In three or more dimensions, it does not make sense to say that an angle between two vectors is negative of$>\pi\$. This is because the plane the vectors are in is somewhat arbitrary and there is no proper way to define an orientation (clockwise vs. anticlokwise).