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1d
asked Evaluate the angle between two curves at their intersection: $y=x^2+1, x^2+y^2=1$
2d
asked Which one of the following ideals is radical?
Oct
19
accepted A power series of $2\times2$ matrices
Oct
19
accepted Find $k$ s.t. $kx^2+4$, $k^2-x^2$ orthogonal
Oct
19
accepted Let $X,Y$ be random variables in uniform distribution, $0\leq X\leq 3$,$0\leq Y\leq 4$, the probability of $X\leq Y$
Oct
19
accepted The graph of $e^z$ for $|z|=1$
Oct
19
accepted The number of elements in $\mathbb{Z}_{11}$ satisfies $x^{12}-x^{10}=2$.
Oct
19
accepted The number of subgroups of $\mathbb{Z}_3\times \mathbb{Z}_{16}$
Oct
19
accepted Integer $k$ such that $k!$ has 99 zeros
Oct
5
asked The weak formulation of Navier Stokes Equation
Oct
4
awarded  Popular Question
Sep
24
comment real root of $x^4-x^3\sin x-x^2\cos x$
@UserX Edited. sorry
Sep
24
revised real root of $x^4-x^3\sin x-x^2\cos x$
added 21 characters in body
Sep
24
comment real root of $x^4-x^3\sin x-x^2\cos x$
@Amzoti But u can't prove these are real roots.
Sep
24
asked real root of $x^4-x^3\sin x-x^2\cos x$
Sep
24
revised The possible area of a triangle if three laterals of a triangle is between $0$ and $1$
edited body
Sep
24
asked The possible area of a triangle if three laterals of a triangle is between $0$ and $1$
Sep
23
asked Let $X,Y$ be random variables in uniform distribution, $0\leq X\leq 3$,$0\leq Y\leq 4$, the probability of $X\leq Y$
Sep
23
comment Find $k$ s.t. $kx^2+4$, $k^2-x^2$ orthogonal
I am doing GRE sub math problem, so I think it is more likely to be the second one.
Sep
23
asked Find $k$ s.t. $kx^2+4$, $k^2-x^2$ orthogonal