\numberwithin{equation}{section} %% Comment out for sequentially-numbered
\numberwithin{figure}{section} %% Comment out for sequentially-numbered
\providecommand{\theoremname}{Theorem}
\theoremstyle{plain}
\numberwithin{equation}{section} %% Comment out for sequentially-numbered
\numberwithin{figure}{section} %% Comment out for sequentially-numbered
\providecommand{\theoremname}{Theorem}
\theoremstyle{plain}