\renewenvironment{dedication}
    {
        \cleardoublepage\thispagestyle{empty}
        \vspace*{\stretch{1}}
        \begin{center}
    }
    { 
        \end{center}
        \vspace{\stretch{3}}
        \clearpage
    }

\newenvironment{copyrights}
    {
        \thispagestyle{empty}
        \null\vfill
        \begin{center}
    }
    { 
        \end{center}
    }
