Reputation
137,590
Next tag badge:
382/400 score
177/80 answers
Badges
10 133 265
Newest
 Nice Answer
Impact
~1.3m people reached

Aug
23
answered Intuitive explanation for how could there be “more” irrational numbers than rational?
Aug
23
answered Number of isoceles triangles
Aug
23
comment Minimal polynomial of a matrix product
@Peregrino because $Ax$ is a multiple of $U$ for all $x$
Aug
23
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.
Aug
23
answered property of real number system
Aug
23
answered how to find out any digit of any irrational number?
Aug
22
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".
Aug
22
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.
Aug
22
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
Aug
22
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.
Aug
22
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.
Aug
22
answered Birds Problem-Brain Teaser- Amazon interview question
Aug
22
answered n+1 vectors in $\mathbb{R}^n$ cannot be linearly independent
Aug
22
answered Completeness condition in Gödel first incompleteness theorem superflous
Aug
22
revised Completeness condition in Gödel first incompleteness theorem superflous
edited title
Aug
22
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 :)
Aug
22
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.
Aug
22
answered solutions poker texas hold'em
Aug
22
revised How to find the angle between vectors which is not necessarily the smallest angle
added 634 characters in body
Aug
22
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).