Sam Jones
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 May21 comment Problems about symmetric groups And this video: youtube.com/watch?v=8M4dUj7vZJc explains the episode and the proof very well. May11 revised Issues with text problems fixed quotation marks May11 suggested approved edit on Issues with text problems May11 comment Issues with text problems I think this question is extremely difficult to answer. Personally, I don't believe that there is a "one size fits all" approach to problem solving which will work for everyone. Your general method of: (1)what do I have? (2)what do I want? (3)how do I turn what I have into what I want? Is as good as one can do, in general (in my opinion). The problem in this particular question seems to be that the student is unsure of what the question is actually asking them to calculate. May10 comment Trig limit of $\lim\limits_{x\to 0}\frac{\sin{6x}}{\sin{2x}}$ No problem, this site uses some form of latex for displaying equations, you have to surround the mathematics with \$for an inline piece of mathematics and \$\$for a "displayed" piece. en.wikipedia.org/wiki/LaTeX might be a good place to find out more. May10 revised Trig limit of$\lim\limits_{x\to 0}\frac{\sin{6x}}{\sin{2x}}$Added latex notation May10 suggested approved edit on Trig limit of$\lim\limits_{x\to 0}\frac{\sin{6x}}{\sin{2x}}$May4 answered About single-valued function May3 answered What's the meaning of a quadratic equation? Apr28 comment is it possible to get the Riemann zeros I'm not entirely sure what you are asking but it seems to be related to what I'm about to say. It is entirely possible to calculate actual zeros of the Riemann-zeta function (up to some given height in the complex plane) and verify that they all(up to that height) lie on the critical line. This has been studied extensively, notably, by Odlyzko: dtc.umn.edu/~odlyzko All the information you would need to implement some algorithms and do some calculations yourself are in this well known and cheap book: amazon.com/Riemanns-Zeta-Function-Harold-Edwards/dp/0486417409 Apr24 comment Subgroups in Group Theory? As mentioned by Alastair Litterick, I think you are looking for this: en.wikipedia.org/wiki/Lagrange%27s_theorem_%28group_theory%29 but you should probably try to understand the basic definitions of groups, subgroups and cosets before you try to understand a proof of Lagrange's theorem. Apr23 comment Logical Equivalance As said by countinghaus, truth tables consider every possible true/false assignment to each variable p, q and r. so you simply draw a table with the value of p, q, and r in it, you can then work out the value for q implies r for each row and then the value for p implies (q implies r) and similarly for the second expression, if the tables are the same then they are equivalent, but you will find that they differ on the row I mentioned. Have a look at en.wikipedia.org/wiki/Truth_table#Logical_implication for more information and an example. Apr23 answered Logical Equivalance Mar27 answered Group Theory Isomorphism$ |G|=10$and$\mathbb{Z}_{10}$Mar26 awarded Editor Mar26 revised$\lim\limits_{n\to\infty} n·(\sqrt[n]{a}-1)$The input to Wolfram was wrong, I changed it so that it was calculating the same limit that the OP asked for. Mar26 suggested approved edit on$\lim\limits_{n\to\infty} n·(\sqrt[n]{a}-1)\$ Mar16 awarded Supporter Mar15 awarded Teacher Mar15 answered Surjective Functions