I came to
the universally quantified assumption overflows the derivation line.
My source is
\documentclass{beamer} \usepackage{bussproofs} \newcommand{\mydots}{ \def\extraVskip{-2pt} \noLine \UnaryInfC{\vdots} \def\extraVskip{2pt} \noLine } \begin{document} \AxiomC{$\exists t. A(t)$} \AxiomC{[$\forall t. A(t)$]} \mydots \UnaryInfC{$C$} \RightLabel{$\exists$E} \BinaryInfC{$C$} \DisplayProof \end{document} How can I fix this within using bussproofs.sty ?


