ghshtalt
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 Sep 23 accepted Why exactly can you take the absolute value of one side of this inequality and assume it is still true? Sep 20 accepted Why is it that $\left|b_n - b \right| < \frac{\left|b \right|}{2} \Rightarrow \left| b_n \right| > \frac{\left|b \right|}{2}$? Sep 7 accepted What is the explanation for the elements of this set? Aug 20 accepted What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers? Jul 6 accepted For which $k \in \mathbb{R}$ will this be a euclidean vector space? Jul 4 accepted Help understanding this example of a linear operator which rotates each vector $v$ about the z-axis by an angle $\theta$ Jul 1 accepted Understanding this partial derivative problem Jun 4 accepted Does this equality always hold? May 14 accepted Are bounded sequences always strictly less than some fixed number $M$? May 6 accepted Who was the mathematician who thought “god” was out to get him? Apr 27 accepted How is it shown that a Hermitian matrix will be positive definite? Apr 23 accepted What is the difference between finding a basis for a complex and a real space? Apr 17 accepted How to show certain things related to scalar products Apr 17 accepted How do you show this property of a differentiable function given information about the derivative? Apr 17 accepted Subtraction and division with integers modulo 3 Apr 10 accepted What is the best way to show that no positive powers of this matrix will be the identity matrix? Mar 29 accepted Why does $a_n = (1+\frac{2}{n})^{n}$ converge to $e^2$? Mar 13 accepted Proving elementary inverse image consequence Mar 7 accepted Proving $(2n+1) + (2n+3) + \cdots + (4n-1) = 3n^{2}$ for all positive integers $n$ Feb 13 accepted Why is the 'change-of-basis matrix' called such?