In Lurie's "On the Classification of Topological Field Theories" (and certainly other places) he defines the category $\mathbf{Cob}(n)$ who objects a...

I am working on a joint probability problem and am getting an answer I do not understand. {X: -1, -1, 0, 1, 2} Y = X^2 I determined that the events are de...

Find the values of $k$ so that the following is an inner product on $R^2$, where $u = (x_1,x_2)$ and $v =(y_1,y_2)$ : $f(u,v) = x_1y_1 −4x_1y_2 −4x_2y_1 +...

$\Delta x$, $\delta x$ and $dx$ are used when talking about slopes and derivatives. But I don't know what the exact difference is between them.

I am trying to understand how I can find the point of intersection between two lines numerically. I know how to do this graphically. I would need the two ...

Here's the theorem: Theorem: If $f$ is periodic with Fourier coefficients $a_n,b_n$ and if the series $$\sum_{n=1}^\infty (|n^{k}a_n|+|n^{k}b_n|)$$ c...

The following statement is the axiom of completeness: Every non empty subset of $\mathbb R$ that is bounded above has a least upper bound. So I was wonder...

I saw this question: Vidya wonders why numbers one and zero are neither composite numbers nor prime numbers. Could you please explain to Vidya what can ha...

I've never been to good with Mathematics... I'm wanting to change that as game development has always been a passion of mine. I started studying...

I'm reading Vinogradov's "Elements of Number Theory", am having trouble proving one of his early propositions, and ask for a little help getting...