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1d
accepted Inverse Function Theorem for Banach Spaces
1d
asked Inverse Function Theorem for Banach Spaces
May
23
accepted Injective linear endomorphism of hilbert space is bijective?
May
23
asked Injective linear endomorphism of hilbert space is bijective?
May
23
reviewed Looks OK Why is $f:\mathbb{R^+}\to \mathbb{R}$ defined by $f(x)=x^2$ not an invertible function?
May
23
reviewed No Action Needed A Problem on the Prime Counting Function $\pi(x)$
May
23
reviewed Approve How to prove the inequality on relative entropy?
May
20
revised Don't understand the Fundamental Theorem of Calculus
spelling
May
20
answered Don't understand the Fundamental Theorem of Calculus
May
20
answered What is the general formula $t_n$ for this sequence?
May
18
asked Is it necessary for $A$ to be symmetric with non-zero determinant?
May
18
reviewed Approve How to show that the limit of the sequence $(\frac1n)^{\frac1n}$ is $1$?
May
18
reviewed Approve Definite integral (Weierstrass)
May
18
reviewed Approve Changing order of integration for $\int^2_1 \int^{\sqrt{2x-x^2}}_{2-x}f(x,y)\,dy\,dx$
May
17
reviewed Approve How can I prove that $f(| a|) = -|a|$?
May
17
comment Show that $ \int_{-\infty}^{\infty} \frac{x^3}{(x^2+4)(x^2+1)}\, dx$ does not converge
@tired my reasoning is: $\frac{x^2+4}{x^2} \rightarrow 1$, so $x^2 +4\leq 2x^2$ for sufficiently large $x$. Analogously, $x^2+1 \leq 2x^2$
May
17
revised Show that $ \int_{-\infty}^{\infty} \frac{x^3}{(x^2+4)(x^2+1)}\, dx$ does not converge
added 258 characters in body
May
17
answered Show that $ \int_{-\infty}^{\infty} \frac{x^3}{(x^2+4)(x^2+1)}\, dx$ does not converge
May
17
reviewed No Action Needed find the coefficient of $x$ , in $P_{20}(x)$
May
17
reviewed No Action Needed Can someone explain 4th dimensional objects?