Mathematical Abbreviations

$\mathop{\hbox{tr}}(\data{A})$ trace of matrix $\data{A}$  
$\textrm{hull}(x_1, \ldots ,x_k)$ convex hull of points $\{x_1, \ldots ,x_k\}$  
$\mathop{\hbox{diag}}(\data{A})$ diagonal of matrix $\data{A}$  
$\mathop{\rm {rank}}(\data{A})$ rank of matrix $\data{A}$  
$\mathop{\rm {det}}(\data{A})$ determinant of matrix $\data{A}$