Tim Seguine
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 Sep 15 comment How do I make a student understand contradiction? @Aron Most sudokus can actually be completed without guessing. You can solve them like logic puzzles. Aug 7 awarded Notable Question May 22 awarded Popular Question Apr 15 awarded Popular Question 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 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 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 5 comment Is it possible to write a sum as an integral to solve it? @Amad27 $\int_\mathbb{N}\frac{d \mu}{(3n-1)(3n+2)}$ where $\mu$ is the counting measure on $\mathbb{N}$. It doesn't give you anything you didn't already have though. I didn't really mean it seriously although it is true. Nov 5 comment solving 3 simultaneous equaitons So you are trying to get us to help you cheat on a test?