15,190 reputation
13079
bio website linkedin.com/in/crntaylor
location London, United Kingdom
age 30
visits member for 3 years, 7 months
seen 20 hours ago

I'm broadly interested in very applied math. I try to apply ideas from mathematics, statistics, machine learning, formal systems and computer science to solve real-world problems. Mostly in applied finance/quantitative trading, but in other areas if the mood takes me.


The following is for my own use, but feel free to borrow it -

Hi. It looks like you are new here. We are generally very willing to help, but we like users to show the work that they've done towards solving the problem on their own first. If you can edit your question to show the code you've written so far, and where you are stuck, then you will get a much better response.


Jan
9
comment There exists a power of 2 such that the last five digits are all 3's or 6's. Find the last 5 digits of this number
Thanks, this was very interesting.
Jan
8
comment There exists a power of 2 such that the last five digits are all 3's or 6's. Find the last 5 digits of this number
In case anyone is interested, the first such powers of 2 are $2^{1196}$, $2^{3696}$, $2^{6196}$ ... and all solutions are of the form $2^{1196 + 2500k}$ for $k=0,1,2,\dots$.
Jan
8
comment Confusion with the definition of mean value
@jjepsuomi Sure, it isn't a sum of function values. As I said, it is a generalization or a limit of a sum of function values, and the $\mu$ that you define in your question is a generalization or a limit of a mean. But we just call it a mean, because in most cases it behaves just like a mean.
Jan
8
answered Confusion with the definition of mean value
Jan
6
revised Let $L : K$ be a field extension such that $[L:K]=2$. Show that $L:K$ is a normal extension.
rolled back to a previous revision
Dec
31
answered negative number divided by positive number, what would be remainder?
Dec
30
comment Mathematicians don't quit, they fade away
No one has mentioned finance, which has a hunger for mathematicians educated up to grad school level, to work as traders, structurers, model validators, derivative pricing quants, risk quants, developers/researchers for trading algorithms etc etc.
Dec
26
awarded  Enlightened
Dec
26
awarded  Nice Answer
Dec
19
answered All solutions of $a+b+c=abc$ in natural numbers
Dec
17
awarded  Yearling
Dec
16
comment Help me, $R^n$ Analysis
Hi. It looks like you are new here. We are generally very willing to help, but we like users to show the work that they've done towards solving the problem on their own first. If you can edit your question to show what you're done so far, and where you are stuck, then you will get a much better response.
Dec
16
comment Notation for derivative of a 2 argument function w.r.t its second argument
It's not uncommon, particularly in physics, to see the notation $f_{,i}$ which means "$f$ differentiated with respected to its $i$th argument", so e.g. $f_{,1}$ would be $f_x$ and $f_{,2}$ would be $f_y$. Other common notations are $\partial_i f$, which has the advantage that you can refer to the second and third derivatives as e.g. $\partial_i^2f$ or $\partial_i^3f$.
Dec
12
answered How to calculate $(a+b)(c+d)$
Dec
11
revised Hom Functors and locally small categories.
added 53 characters in body
Dec
11
revised Generation of “random” multilinear polynomials for testing non-negativity algorithm
added 521 characters in body
Dec
11
comment Generation of “random” multilinear polynomials for testing non-negativity algorithm
Then you use a standard random number generator (e.g. MT19937) with an initial seed. Include your code and the seed in the paper - then any reader can reproduce your results.
Dec
11
comment Generation of “random” multilinear polynomials for testing non-negativity algorithm
Are you familiar with random number generation from a fixed seed?
Dec
11
answered Generation of “random” multilinear polynomials for testing non-negativity algorithm
Dec
10
answered How do you find the probability that n of cards are red cars?