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 Nov 30 revised About 2-adic representation of integers added 28 characters in body Nov 22 revised Motivating the Cayley-Dickson construction by proving Hurwitz's theorem added 616 characters in body Sep 22 revised Does the intersection of two finite index subgroups have finite index? added 148 characters in body Aug 22 revised Intuition behind the construction of Young Symmetrizer Bump. Aug 5 revised If a $n$-manifold exists, then is it the boundary of an existing $(n+1)$-manifold? deleted 150 characters in body Jul 22 revised Find $\lim\limits_{x \rightarrow \infty} x e^{x^2} \int_x^{\infty}e^{-u^2}du$ added 4 characters in body; edited title Jul 3 revised Braid groups and the fundamental group of the configuration space of $n$ points added 2521 characters in body Jul 1 revised Braid groups and the fundamental group of the configuration space of $n$ points added 1649 characters in body Jun 23 revised Question about countable and uncountable map correspodence deleted 288 characters in body Jun 23 revised How to compute the automorphism group of split metacyclic groups? added 4 characters in body Jun 11 revised What is $\frac {d}{dx}(y=\frac {e^{-x/2}}{u^{1/2}})$? deleted 123 characters in body May 31 revised Couldn't there be a better definition of imaginary numbers? added 669 characters in body May 31 revised Couldn't there be a better definition of imaginary numbers? added 669 characters in body May 30 revised Finding explicit discrete valuation of ring of germs of analytic functions on $\mathbb{C}$ deleted 318 characters in body May 29 revised Show that the subset $\overline{I} = \{\overline{x}:x \in I\}$ is an ideal. added 33 characters in body May 28 revised The number of $3\times 3$ nilpotent matrices over $\mathbb{F}_q$ using the Orbit-Stabilizer theorem deleted 246 characters in body May 26 revised For which $x\in\mathbb{R}$ is the series of general term $a_n = x^{n!}$ convergent? added 16 characters in body; edited tags; edited title May 26 revised The number of $3\times 3$ nilpotent matrices over $\mathbb{F}_q$ using the Orbit-Stabilizer theorem added 5 characters in body May 24 revised Show that $\mathbb{C} \otimes_\mathbb{Z} \mathbb{C} \cong \mathbb{C} \otimes_\mathbb{Q} \mathbb{C}$ added 22 characters in body May 22 revised DVR, power series expansion. deleted 208 characters in body