In my example below, I need to write it "nicely", i.e., to have the array with ones smaller, less space around,...Anyone knows how to do it?
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}
\newcommand{\vX}{\boldsymbol{X}}
\newcommand{\vP}{\boldsymbol{P}}
\newcommand{\vN}{\boldsymbol{N}}
\newcommand{\vT}{\boldsymbol{T}}
\newcommand{\vI}{\boldsymbol{I}}
\begin{equation}\nonumber
\vX_1 = -\rho\vP^{o}\vT-\rho\vP^g\big(\left(
\begin{array}{l}
1\\
1
\end{array}
\right)\otimes \vI\big)\vN,
\end{equation}
\end{document}
\left(\begin{smallmatrix}1\\1\end{smallmatrix}\right)