\(\newcommand\B{\mathrm{B}} \newcommand\cB{\mathcal{B}} \newcommand\BC{\mathrm{BC}} \newcommand\cC{\mathcal{C}} \newcommand\C{\mathbf{C}} \newcommand\cF{\mathcal{F}} \newcommand\cG{\mathcal{G}} \newcommand\cN{\mathcal{N}} \newcommand\cP{\mathcal{P}} \newcommand\Q{\mathbf{Q}} \newcommand\R{\mathbf{R}} \newcommand\cS{\mathcal{S}} \newcommand\T{\mathcal{T}} \newcommand\cU{\mathcal{U}} \newcommand\cV{\mathcal{V}} \newcommand\cW{\mathcal{W}} \newcommand\cX{\mathcal{X}} \newcommand\cY{\mathcal{Y}} \newcommand\Z{\mathbf{Z}} \DeclareMathOperator\diam{diam} \DeclareMathOperator\dist{dist} \DeclareMathOperator\id{id} \DeclareMathOperator\ord{ord} \newcommand\blank{\mkern12mu} \newcommand\isom{\stackrel{\sim}{\longrightarrow}} \newcommand\norm{\|\blank\|} \newcommand\simp{\mathrel{\mathop{\kern 0pt\sim}_{\rm p}}} \newcommand\simq{\mathrel{\mathop{\kern 0pt\sim}_{\rm q}}} \newcommand{\lt}{<} \newcommand{\gt}{>} \newcommand{\amp}{&} \)