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I'm doing my PhD in Computational Mathematics, Linear Algebra and Visualisation in Australia. Basically, I spend a lot of my day trying to find out what space I am in.


Dec
23
reviewed Approve How much should I scale $dx$ and $dy$ individually to get a vector of required magnitude
Dec
23
answered How much should I scale $dx$ and $dy$ individually to get a vector of required magnitude
Dec
22
comment Can I use Runge-Kutta to solve these two equations?
Yes, you can use Runge-Kutta methods. By moving that term to the left, you get the system of odes $A\frac{d\mathbf{y}}{dt}=\mathbf{f}$. If you were using MATLAB to solve this, the $A$ is called the mass matrix (I think). Alternatively, you could multiply through by $A^{-1}$.
Dec
19
awarded  Constituent
Dec
9
comment use fundamental theorem of calculus to find a function $f(x)$ and a number $a$
@Devin Since $a$ is constant, $a=4$ for all $x$ as described in the answer below.
Dec
9
comment use fundamental theorem of calculus to find a function $f(x)$ and a number $a$
Hint: To find $a$, what happens at $x=4$?
Dec
8
awarded  Caucus
Dec
1
awarded  Nice Answer
Nov
26
reviewed Leave Open How prove this diophantine equation $x^2+y^2+z^3=n$ always have integer solution
Nov
26
reviewed Reject Show that $\int_0^\infty \frac{\sin (\lambda x)}{e^x} \, \mathrm dx =\frac{\lambda}{1+{\lambda^2}}$
Oct
10
answered How do I find the normal equation for a plane in 4 dimensions
Oct
8
reviewed Leave Open Set of zeros of derivate - Lebesgue measure
Oct
8
reviewed Close How to solve a linear stochastic differential equation?
Oct
8
reviewed Leave Open Actually playable games based on graphs?
Oct
8
reviewed Close Consequences of irrationality of e
Oct
8
reviewed Leave Open Null of linear map, range of linear map in polynomial
Oct
8
reviewed Leave Closed How do I compute the determinant of (AA^T) where A is a not square
Oct
6
answered I need to find the smallest lambda for which $P(X\ge 2)=0.99$ when $X\sim \text{Poisson}(λ)$
Oct
6
answered Approximation of $T10$ for integral $\int_0^1\sin(x^2) dx$ Trapezoid Approximation
Sep
30
awarded  Explainer