3}\big)^3\right]$ have a closed form?

9 events

when toggle format	what		by	license	comment
May 17 at 9:22	comment	added	Dan		@MaxMuller Yes, I did. Unfortunately it didn't help.
May 17 at 9:10	comment	added	Max Lonysa Muller		@Dandif you check the OEIS?
May 17 at 3:45	history	edited	Dan	CC BY-SA 4.0	added 579 characters in body
May 17 at 0:34	comment	added	user491858		@mathworker21 It is very much a different (and easier) question to say that a function does not have a closed form. Proving that $\log(x)$ is a transcendental function over $\mathbf{Q}(x)$ is easy. Proving that $\log(-1) = \pi i$ is transcendental is harder.
May 17 at 0:10	comment	added	mathworker21		@user491858 Isn't there a whole theory that is able to say, e.g., $\int e^{-x^2}dx$ does not have a "closed form"?
May 16 at 22:39	comment	added	Dan		@user491858 If no one here provides a closed form, I'll assume that it probably doesn't have a closed form.
May 16 at 22:38	comment	added	user491858		Do you want an answer beyond "obviously not"? Proving that something doesn't have a closed form is close to impossible. I don't even know how to prove that $\sum_{k=1}^{\infty} 1/k^5$ doesn't have a closed form as a rational number.
May 16 at 22:33	history	edited	Dan	CC BY-SA 4.0	added 26 characters in body
May 16 at 22:20	history	asked	Dan	CC BY-SA 4.0