658 reputation
417
bio website lnkd.in/dB_xCjX
location Wernau, Germany
age 29
visits member for 3 years, 3 months
seen 2 days ago

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.


Dec
8
awarded  Caucus
Dec
4
revised Discrete Math Probability and Random Variable review question
OP changed question to a completely different one after getting an answer. reverting.
Dec
4
comment Interesting Question on Ants
@jwg If you think so. I only posted that because I came to the "right" conclusion after reading the question, then the accepted answer in their entirety 3 times. If you consider that clarity, then we have most likely have different definitions of clarity. It seems to me that this was the source of some of the initial confusion people were having with the accepted answer.
Dec
4
suggested approved edit on Discrete Math Probability and Random Variable review question
Dec
4
comment Discrete Math Probability and Random Variable review question
Don't change the question to a completely different one after getting an answer. That is not how this site works.
Dec
4
comment Matlab wrong cube root
I think "wrong" is the wrong word to use. Without context there is no objective way to select the "best" result for a many valued function.
Nov
25
comment Interesting Question on Ants
Is it a one dimensional stick, or a topological cylinder? "Random directions" seems like confusing wording if it is one-dimensional.
Nov
23
comment How to find $f^{−1}([9,0])$ and $f([1,4])$ for $f(x)=x-6\sqrt{x}$?
Your title is different than your question.
Nov
22
comment Why does my professor say that writing $\int \frac 1x \mathrm{d}x = \ln|x| + C$ is wrong?
@Winther I disagree.
Nov
22
comment Why does my professor say that writing $\int \frac 1x \mathrm{d}x = \ln|x| + C$ is wrong?
@Winther probably the posted answer from Ivo is what the teacher meant.
Nov
22
comment Solution of system of three variables
The OP is not asking how to solve the system, they are asking why it does not have a unique solution
Nov
20
comment Prove this map is continuous
It might be easier to do a direct epsilon delta proof of the original map if you get rid of the trig functions. (hint: polar coordinates to cartesian). As long as you can also prove (or are allowed to use a theorem) that the coordinate transformation is continuous and bijective on the annulus.
Nov
20
comment Prove this map is continuous
Well what you are doing is a direct sum of two continuous maps (assuming you prove they are). There is nothing non-continuous there, if that is what you are asking.
Nov
20
comment Prove this map is continuous
What definition are you using for continuity? For the last thing you said: If you prove your new map is continuous then the original map is continuous because multiplication is continuous.
Nov
20
comment What properties are true for “almost all real numbers”?
@user2357112 thanks for the link.
Nov
20
comment Do Cantor's Theorem and the Schroder-Bernstein Theorem Contradict?
@The it is only defined for finite subsets because not every subset of N has that specific form. Specifically infinite subsets of N don't have that form. Your prime number multiplication construction that follows relies on k being finite, so it couldn't be modified to allow infinite subsets.
Nov
18
comment Absolute and relative maximum and minimum
You find points that might be maxima or minima by critical values. They don't have to be though. That is what the second derivative test is supposed to help decide.
Nov
18
comment Absolute and relative maximum and minimum
Don't worry, I was talking to the person who changed it. That is what the @ thing is for
Nov
18
comment Absolute and relative maximum and minimum
@user193664 Okay, what does that tell you?
Nov
18
comment Absolute and relative maximum and minimum
@vlad why did you change what the OP said they calculated?