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Jun
27
comment Formula of the radius of a circle
have you tried drawing a picture and labelling?
Jun
27
reviewed Reviewed What does $\Bbb R/2\pi$ for a set mean?
Jun
27
comment What does $\Bbb R/2\pi$ for a set mean?
it would be useful to provide a link to the article!
Jun
27
reviewed Reviewed Why is $x^{100} = 1 \mod 1000$ if $x < 1000$ and $\gcd (x,1000) = 1$?
Jun
23
reviewed No Action Needed Every combination of $v = (1, -2, 1)$ and $w = (0, 1, -1)$ has components that add to ________.
Jun
23
revised How can I check if a function is always $\ge 0$ for all values of its parameter $\ge 0$?
fixed grammar
Jun
21
reviewed Reviewed Maximum disconnected nodes in a DAG
Jun
21
reviewed No Action Needed What is $\lim_{n \to \infty} n^3 a_n$?
Jun
16
reviewed Reviewed Is $2^{205379}+59^9$ a prime number?
Jun
16
reviewed No Action Needed Simplifying $\sum_{i=1}^n {1\over i(i+1)}$ to ${n\over n+1}$
Jun
15
comment How can I prove $n - 2\sqrt{n} = \Theta(n)$
you should define these things because as far as I know, only $O$ is standard notation.
Jun
15
reviewed Reviewed How can I prove $n - 2\sqrt{n} = \Theta(n)$
Jun
15
comment How can I prove $n - 2\sqrt{n} = \Theta(n)$
Whats the difference between $\Theta$ and $O$, and $\Omega$?
Jun
15
answered How can I check if a function is always $\ge 0$ for all values of its parameter $\ge 0$?
Jun
15
reviewed No Action Needed How can I check if a function is always $\ge 0$ for all values of its parameter $\ge 0$?
Jun
15
reviewed No Action Needed Expected waiting time with $m$ tellers and $n$ customers at a bank
Jun
15
reviewed Reviewed Hadamard matrices and sub-matrices (Converse of Sylvester Construction)
Jun
15
reviewed No Action Needed Find the values of b for which the line $y=3x+b$ intersects the circle $x^{2}+y^{2}=4$
Jun
15
reviewed No Action Needed Solving $Ax=b$ with $x = [sin(\theta) cos(\theta)]'$
Jun
14
comment Solving heat equation with Dirichlet boundary conditions on an interval
Please show us some steps of you trying separation of variables so we can see better where you are stuck