620 reputation
215
bio website lnkd.in/dB_xCjX
location Wernau, Germany
age 28
visits member for 2 years, 7 months
seen Apr 14 at 16:31

I am a small time web developer and maintenance programmer toiling in obscurity. I have a BS in Mathematics, and I am working on my Masters.

US-American living in Germany.


Apr
12
comment Formalism in integration
Doesn't "sufficiently nice" include something along the lines of "g is bijective on the domain of integration"?
Apr
10
comment Visually deceptive “proofs” which are mathematically wrong
I think "seemingly nonsense results" is a little harsh. Divergent series methods often give "right" answers when applied to real problems. It's no different or more suspect than extending any other arbitrary linear, bounded functional. There wouldn't be so many different divergent series methods if nobody considered it useful.
Apr
10
comment Combine SVM kernels
You could probably use a weighting function to combine kernels.
Apr
5
comment Is an SD card a fair coin… to me?
@MGA if I decide that I feel like writing it up, I will do an "answer your own question" post on it linking to your answer here. I think the expected number of rolls would be interesting to see as well, but I didn't do that calculation.
Apr
4
comment Is an SD card a fair coin… to me?
I posit that if you are "just as likely to decide to assign an outcome to one side of this SD card as to the other" then you don't need a coin. In order for that to be true, your brain must be capable of generating the equivalent of fair coin tosses.
Apr
4
comment Is an SD card a fair coin… to me?
@MGA I just did a back of the envelope calculation on that. In order to have a 95% probability of successfully generating just one guaranteed fair roll of a 20 sided die, you would have to roll it over two and a half billion times.
Apr
4
comment Is an SD card a fair coin… to me?
Actually this is good even if you do have a coin, since as far as I know most coins are not fair coins. Just out of curiosity is there a version that would work for dice?
Apr
4
comment Permutation Multiplication (easy)
@user138913 as long as the order of the numbers in the cycle remains the same, they represent the same cycle.
Apr
4
comment Permutation Multiplication (easy)
Work out where each number maps to.
Apr
3
comment System of 3 equations with 3 unknowns with 6 solutions
@heropup If I were programming it, I would check for rational roots, and if there were none, calculate them based on the cubic formula.
Apr
3
comment System of 3 equations with 3 unknowns with 6 solutions
@amWhy What I am guessing happened is the OP wrote $(x-a)(x-b)(x-c)$ and then expanded it and collected powers of $x$. The question is about the system that results from that.
Apr
3
comment System of 3 equations with 3 unknowns with 6 solutions
Setting up a 3 variable system like you did is unlikely to be easier to solve than the original in my opinion. As you have already noticed you get a combinatorial explosion in the number of solutions.
Mar
30
comment Proving Fibonacci number?
Oh, I just noticed at the end there is also a question about divisibility by 4
Mar
30
comment Proving Fibonacci number?
wouldn't mod 3 make more sense? Or did I have a brainfart?
Mar
30
comment Proving Fibonacci number?
If you wanted to do induction it would be more natural try to show that $F_{4(n+1)}$ is disvisible by three if $F_{4n}$ is divisible by three.
Mar
30
comment Limit of a Logarithm with Different Bases
Have you tried the base change formula?
Mar
19
comment How does the exponent of a function effect the result?
A way around some of these issues is to just define integral exponentiation, then define the complex exponential function, and to define exponentiation in terms of exp and log. That has its own issues of course.
Mar
13
comment $\frac{\mathbb{Z}}{m\mathbb{Z}}\otimes_{Z}\frac{\mathbb{Z}}{n\mathbb{Z}} \cong \frac{\mathbb{Z}}{d\mathbb{Z}}$
Look at the generators of each and see if you can use them to construct an isomorphism.
Mar
13
comment $\frac{\mathbb{Z}}{m\mathbb{Z}}\otimes_{Z}\frac{\mathbb{Z}}{n\mathbb{Z}} \cong \frac{\mathbb{Z}}{d\mathbb{Z}}$
Not to nitpick, but shouldn't the lines be slanted? These are equivalence classes, not fractions.
Mar
13
comment Examples of mathematical results discovered “late”
Could you be a bit more specific? which properties exactly?