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location Germany
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visits member for 1 year, 5 months
seen Apr 16 at 21:01

maths student, hobbyist number theorist and dreamer


Feb
9
revised $\theta_1 + \theta_2 = -35.5$ how to find the values of those $\theta$s?
fixed latex
Feb
9
suggested suggested edit on $\theta_1 + \theta_2 = -35.5$ how to find the values of those $\theta$s?
Dec
15
comment Prime decomposition over the real numbers?
Remember that I basically "choose" my prime elements and do not acquire them via divisibility rules - $\frac{1}{x}$ can just be defined as one, or else be the product of other elements in $P$.
Dec
15
comment Prime decomposition over the real numbers?
@edit - why would it give problems to have $\frac{1}{x_i}=x_i^{-1}\in P$? I really dont see that argument... Sorry if these objections are useless, but im trying to understand the matter.
Dec
15
comment Prime decomposition over the real numbers?
Sorry for taking away the accept for now, I would like to know: am I really trying to show that? The fact that each number is a unit gives problems usually, since each element $x$ can be written as $x y y^{-1}$ - I take out this case purposefully
Dec
15
asked Prime decomposition over the real numbers?
Nov
22
awarded  Favorite Question
Nov
9
awarded  Notable Question
Nov
3
awarded  Yearling
Sep
1
comment Jigsaw Puzzle Help
$20''\times 27'' = 540$ sq inches Equally dividing that over 1000 pieces gives us $0.54$ sq inches per piece. Assuming that the pieces are square, we have a borderlength of $\sqrt{0.54}=0.735''$ per piece. The amount of pieces along one border is $27/0.735=36.73$ - This is not even close to an integer, meaning our assumption (pieces are square and equally in size) was incorrect - we need to know that in order to give qualified answers ;)
Sep
1
comment $\pi$ in arbitrary metric spaces
@Arjang aside from that this is the first question ever on Math.SE that has $\pi$ points? I guess not.
Aug
13
comment Solving Linear ODE using matrices
it means that $\begin{pmatrix}\dot x\\\dot y\end{pmatrix}=A\begin{pmatrix}x\\y\end{pmatrix}=\begin{pmatrix}y\\x\end{pmatrix}$
Aug
5
comment Mathematical notation for redefined set?
Yes. Write $W:=\{1,3,5,2,7,9,10,18\}$ and $W':=\{7,9,10,18\}$ and everyone will know what your intention is.
Aug
5
comment Mathematical notation for redefined set?
This is generally accepted. Use $:=$ for definitions and you have to care about ambiguity. You could even define your own notation, for example $W_{>5}$, however $W'$ is totally fine.
Aug
5
comment $ \frac {dy}{dx} \sin y = (1-x\cos y)\cos y$
Just for clarification, you want to solve for y?
Aug
5
answered Help with Riemann integration
Aug
5
answered Which linear map maps $\begin{bmatrix}a_0&a_1&a_2\end{bmatrix}^\top\mapsto \begin{bmatrix}a_0&a_0+a_1&a_0+a_1+a_2\end{bmatrix}^\top$?
Jul
19
answered How many ways to arrange a group of 10 R's and 10 D's?
Jul
19
revised Calculating the norm of an infinite vector
corrected latex formatting
Jul
19
comment Prove $\varphi\in\mathcal{S}(\mathbb R^n)$ if and only if the following inequality holds..
@Rasmus might be $C_0^\infty = C_{c(ompact)}^\infty$ too, idk about what exactly is the requirement here. However, the definition doesnt make sense here. $\mathcal{S}$ is defined as the set of all fast-falling functions. The functions that have compact support fulfill this property trivially?