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 Feb 10 revised integrate $\int \frac{dx}{4+3\sin2x}$ fixed math operator notation Jan 28 revised Why does the sum of two linearly independent solutions of a second order homogeneous ODE give a general solution? corrected the statement about non-vanishing of the Wronskian Jan 27 comment Why does the sum of two linearly independent solutions of a second order homogeneous ODE give a general solution? we are concerned here with linear independence of $y_1$, $y_2$, not $A$ and $B$. It does not make sense to speak about the linear dependence of constants Jan 27 answered Why does the sum of two linearly independent solutions of a second order homogeneous ODE give a general solution? Jan 4 answered Difficult Integral Oct 21 reviewed Approve Is $HK$ abelian? Oct 21 comment Olympiad inequality problem with $a+b+c+abc=4$ I think you are right.. It did seem too easy anyway Oct 19 answered Olympiad inequality problem with $a+b+c+abc=4$ Jul 28 answered Find a polynomial from an equality Jul 27 comment Find a polynomial from an equality May 21 awarded Yearling Aug 5 awarded Necromancer Jul 29 reviewed Approve Represent a prime number $p$ congruent to $1$ $\pmod{3}$ by a sum of a square and $3$ times a square Jul 17 awarded Enlightened Jul 17 awarded Nice Answer Jun 8 reviewed Approve Why does $1-\sqrt{1-4pq} = 1-|p-q |$ for $p \in (0,1)$ and $q=1-p$? Jun 2 answered Why a subspace of a vector space is useful May 21 awarded Yearling Mar 10 awarded Nice Answer Feb 2 reviewed Approve Packing circles on a line