# Form of the Shannon capacity for Heptagon?

Is the $0$-error capacity of $7$-cycle:

$(1)$ known to be of form $7^q$ for some $q\in \mathbb Q$?

• I voted down because it does not show research effort. Simple Google search could answer your question: nothing is known about the Shannon capacity of C_7. – Boris Bukh Oct 16 '14 at 13:49

Indeed as Daniel pointed out, the Shannon capacity of $C_7$ is still unknown. Also, to say something closer to your question, its specific form is still unknown (in my knowledge).