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May
15
reviewed Approve Integration of $\dfrac{x}{\sinh x}~dx$ from $-\infty$ to $\infty$
May
9
accepted Evaluate the angle between two curves at their intersection: $y=x^2+1, x^2+y^2=1$
May
9
accepted Sufficient condition for the block matrix $\big(\begin{smallmatrix} B & A^T \\ A & 0 \end{smallmatrix} \big)$ to be invertible
May
9
accepted The closed set in the product topology
May
9
accepted real root of $x^4-x^3\sin x-x^2\cos x$
May
9
accepted $\int_0^\pi g(\theta)\sin(\theta)\cos^n(\theta)\equiv 0$ imply $g(\theta)=0$?
May
9
accepted Lebesgue integrable discontinuity points
May
9
accepted The dimension of the operator if the domain has dimension 2
May
9
accepted Integrate $\int_0^\pi e^{-ik\cos\theta}\sin^2{\theta} \, \mathrm{d}\theta$
May
7
awarded  Popular Question
Mar
29
awarded  Popular Question
Feb
23
comment The definition of open set in metric space and general topological zpace
Could u be more concrete for general metric for topological space
Feb
23
asked The definition of open set in metric space and general topological zpace
Jan
26
accepted The orthogonal operator onto $ran(T)$
Jan
26
accepted Why for dirac function $\int_{-\infty}^{\infty}\delta(x)\ dx=1$
Jan
18
awarded  Yearling
Jan
7
comment Why for dirac function $\int_{-\infty}^{\infty}\delta(x)\ dx=1$
@AdamHughes we always use it, but up till now I find that it is bad, since how can we say the function defined like that has integration is 1 but not 2?
Jan
7
asked Why for dirac function $\int_{-\infty}^{\infty}\delta(x)\ dx=1$
Dec
13
asked The orthogonal operator onto $ran(T)$
Dec
12
asked Integrate $\int_0^\pi e^{-ik\cos\theta}\sin^2{\theta} \, \mathrm{d}\theta$