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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?