Recent content by studentstrug

Either whoever interviewed you is incompetent for not asking if you were qualified in a key criterion of the job, or you have covered up your own lack of expertise at the interview. Either way, the unfortunate consequence is that a more qualified applicant has probably missed out on the...

What is the context of this integral? Why do you need to figure it out? (It is straightforward to use Liouville's thereom to prove that the indefinite integral of e^{1/x} is non-elementary, that is, cannot be expressed in finite terms of elementary functions).

OK, the integral is correct, the derivative of it gives the correct integrand - I made a data entry error with WolframAlpha (1001 instead of 10001). But I still don't get HOW they constructed these two examples - how thay knew that 71 would work but 72 would not work. I believe it has...

Hi all. I was reading this Wikipedia article: http://en.wikipedia.org/wiki/Risch_algorithm I have a couple of questions about \int \frac{x}{\sqrt{x^4 + 10x^2 - 96x - 71}} \, dx and \int \frac{x}{\sqrt{x^4 + 10x^2 - 96x - 72}} \, dx discussed in the article. How the heck did they get the...

Great link. Thanks for that. I guess all that's left is to prove that it is indeed a non-elementary integral.

I'm interested in how this modification can be done. I've had a go at it without much luck.