使用“multicols”将项目符号推到左边，以便它适合一行？

Question

考虑以下：

\documentclass[12pt,a4paper,oneside]{book}
\usepackage{amsfonts, graphicx, verbatim, mathtools,amssymb, amsthm, mathrsfs,amsmath}
\usepackage{multicol}
\begin{document}
\begin{multicols}{2}
    \begin{itemize}
        \item $\hat{\sigma}\triangleq \max \lbrace\sigma_1^2, \sigma_2^2, \sigma_4^2\rbrace$
        \item $\hat{q}(z) \triangleq \max \lbrace q_1(z), q_2(z), q_4(z)\rbrace$
        \item $\hat{\psi}_p(z)\triangleq [1+\hat{q}(z)]^p-1-p\hat{q}(z)$
        \item $\zeta(z) \triangleq \max \lbrace\hat{\psi}_p(z), \check{\psi}_p(z) \rbrace$
        \item$\kappa\triangleq \min\lbrace \mu+\rho+\xi, \mu+\alpha+\theta+\gamma-\eta, \eta \rbrace$
        \item $\check{q}(z) \triangleq \min \lbrace q_1(z), q_2(z), q_4(z)\rbrace$
        \item$\check{\psi}_p(z)\triangleq [1+\check{q}(z)]^p-1-p\check{q}(z)$
        \item $\mho_p\triangleq \int_M \zeta(z)\nu(dz)$
    \end{itemize}
    \end{multicols}
\end{document}

我怎样才能让右侧的要点稍微靠近左侧的要点呢？