Recent content by Herick

Well, is it e^x a closed form? If by closed form he means a convergent infinite series, then Err(x) is also 'closed form'. Right?

This is $$\frac{\sin (3)}{4 e^2}$$ Let me know if this is the answer. I can explain how i got it.

Is it 0.00477463?

But the Error function is analytic! It is an entire function.

Dear Hejdun This is kind of a guess solution by using residue methods (integration in the complex plane). I am not sure about how to select the right contour. First, I transformed your initial integral to a form with a rational expression inside. The resulting integrand has a 'pole' of order...

Just wondering, did you get a result near $$ \frac { \sqrt { 2 } { e }^{ \frac { { \pi }^{ 2 } }{ 2\quad { \sigma }^{ 2 } } }\pi \left( { \pi }^{ 2 }+2{ \sigma }^{ 2 } \right) { \pi }^{ 2 } }{ { \left( { \sigma }^{ 2 }\pi \right) }^{ \frac { 3 }{ 2 } } } $$?

Hello Hejdun: Just by curiosity, this inquiry follows from a model that you are working with? What is the interpretation of the x^2*exp(x)/(1+exp(x))^2?