documentclass[
DIV=12,
BCOR=5mm,
]{scrbook}[2015/10/03]

usepackage{tipa}
usepackage[
intlimits,
sumlimits
]{amsmath}

begin{document}

begin{equation}
E_A =   k,phi,omega
end{equation}

I want the same  "textomega" , symbol in math mode, if it's possible.

end{document}