Sam Jones
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 May 21 comment Problems about symmetric groups And this video: youtube.com/watch?v=8M4dUj7vZJc explains the episode and the proof very well. May 11 revised Issues with text problems fixed quotation marks May 11 suggested approved edit on Issues with text problems May 11 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. May 10 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. May 10 revised Trig limit of$\lim\limits_{x\to 0}\frac{\sin{6x}}{\sin{2x}}$Added latex notation May 10 suggested approved edit on Trig limit of$\lim\limits_{x\to 0}\frac{\sin{6x}}{\sin{2x}}$May 4 answered About single-valued function May 3 answered What's the meaning of a quadratic equation? Apr 28 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 Apr 24 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. Apr 23 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. Apr 23 answered Logical Equivalance Mar 27 answered Group Theory Isomorphism$ |G|=10$and$\mathbb{Z}_{10}$Mar 26 awarded Editor Mar 26 revised How to find$\lim\limits_{n\to\infty} n·(\sqrt[n]{a}-1)$? The input to Wolfram was wrong, I changed it so that it was calculating the same limit that the OP asked for. Mar 26 suggested approved edit on How to find$\lim\limits_{n\to\infty} n·(\sqrt[n]{a}-1)\$? Mar 16 awarded Supporter Mar 15 awarded Teacher Mar 15 answered Surjective Functions