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15 Finding all solutions to the equation $|||||x|-1|-1|-1|-1|=0$ Aug 30 '14
14 Proving $\frac{n^n}{e^{n-1}}<n!<\frac{(n+1)^{n+1}}{e^{n}}$ by induction for all $n> 2$. Feb 14 '15
13 Arithmetic pattern $1 + 2 = 3$, $4 + 5 + 6 = 7 + 8$, and so on Jan 7 '15
13 Nonhomogeneous wave equation Jun 4 '14
13 Show that $\int_0^\infty e^{-x}\cos x \text{dx}=\int_0^\infty e^{-x} \sin x \text{dx}$ Jan 14 '15
12 Evaluating $ \int x \sqrt{\frac{1-x^2}{1+x^2}} \, dx$ Aug 5 '14
12 Show that a group with $|G| = 33$ contains an element of order $3$ Feb 3 '14
12 Proving that a Hölder space is a Banach space Jan 8 '15
12 Chain rule in the Sobolev space $W^{1,p}$ Jan 19 '15
11 Prove that every subgroup of an abelian group is a normal subgroup. Feb 17 '14
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