Latex tabularx issue with spacing
So just trying to edit a table someone had done in tabularx as I liked the style however I have no idea what I'm doing really and as such I've come up against a problem. There is a big space after the entry 'setup', in the below code and I would like it all to be nice and symmetrical the space makes it very asymmetrical. Is there a way to remove this space?
\documentclass{article}
\usepackage{array}
\usepackage{booktabs}
\usepackage{ragged2e}
\usepackage{tabularx}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\newcolumntype{Y}{>{\RaggedRight\arraybackslash}X}
\begin{document} \noindent \edef\TabularRowHeight{\the\dimexpr-\arraystretch\baselineskip} \begin{tabularx}{\textwidth}{YY} \toprule Alice & Bob \\ \midrule \emph{Setup}\\ \cmidrule(lr){1-1} Alice \& Bob select a prime $p$ and a generator $g$ for the finite field $\mathbb{F}_p$ &\\ &\emph{Private Computation}\\ \cmidrule(lr){2-2} & Bob randomly selects $b \in \mathbb{F}_p$ and then computes the following: $B \equiv g^b \mod p$ once computed Bob sends Alice $B$ \\[\TabularRowHeight] & \\ & \emph{Key Computation}\\ \cmidrule(lr){2-2} & Bob who now has $A$, calculates the following:$A^b \equiv (g^a)^b \equiv g^{ab} \mod p$ \\ \emph{Private Computation}\\ \cmidrule(lr){1-1} Alice randomly selects $a \in \mathbb{F}_p$ and then computes the following: $A \equiv g^a \mod p$ once computed Alice sends Bob $A$ & \\ \pagebreak \emph{Key Computation}\\ \cmidrule(lr){1-1} Alice who now has $B$, calculates the following:$B^a \equiv (g^b)^a \equiv g^{ab} \mod p$ & \\ \bottomrule \end{tabularx}
\end{document}1 Answer
I don't think removing the alternating layout from the table you showed makes a lot of sense, but here is a try
\documentclass{article}
\usepackage{array}
\usepackage{booktabs}
\usepackage{ragged2e}
\usepackage{tabularx}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\newcolumntype{Y}{>{\RaggedRight\arraybackslash}X}
\begin{document} \emph{Setup}: Alice \& Bob select a prime $p$ and a generator $g$ for the finite field $\mathbb{F}_p$ \begin{tabularx}{\textwidth}{@{}YY@{}} \toprule Alice & Bob \\ \midrule \addlinespace[1.2em] \emph{Private Computation}:&\\ \addlinespace
% \cmidrule(r){1-1}\cmidrule(l){2-2} Alice randomly selects $a \in \mathbb{F}_p$ and then computes the following: $A \equiv g^a \mod p$ once computed Alice sends Bob $A$& Bob randomly selects $b \in \mathbb{F}_p$ and then computes the following: $B \equiv g^b \mod p$ once computed Bob sends Alice $B$\\\addlinespace[1.2em] \emph{Key Computation}: &\\ \addlinespace
% \cmidrule(r){1-1}\cmidrule(l){2-2} Alice who now has $B$, calculates the following:$B^a \equiv (g^b)^a \equiv g^{ab} \mod p$ & Bob who now has $A$, calculates the following:$A^b \equiv (g^a)^b \equiv g^{ab} \mod p$ \\ \bottomrule \end{tabularx}
\end{document}Instead I would prefer a 3-column layout:
\documentclass{article}
\usepackage{array}
\usepackage{booktabs}
\usepackage{ragged2e}
\usepackage{tabularx}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\newcolumntype{Y}{>{\RaggedRight\arraybackslash}X}
\begin{document} \emph{Setup}: Alice \& Bob select a prime $p$ and a generator $g$ for the finite field $\mathbb{F}_p$ \begin{tabularx}{\textwidth}{@{}>{\RaggedRight\arraybackslash}p{2.2cm}YY@{}} \toprule & Alice & Bob \\ \midrule \emph{Private \linebreak Computation} & % Alice randomly selects $a \in \mathbb{F}_p$ and then computes the following: $A \equiv g^a \mod p$ once computed Alice sends Bob $A$& Bob randomly selects $b \in \mathbb{F}_p$ and then computes the following: $B \equiv g^b \mod p$ once computed Bob sends Alice $B$\\\addlinespace \emph{Key \linebreak Computation} & Alice who now has $B$, calculates the following:$B^a \equiv (g^b)^a \equiv g^{ab} \mod p$ & Bob who now has $A$, calculates the following:$A^b \equiv (g^a)^b \equiv g^{ab} \mod p$ \\ \bottomrule \end{tabularx}
\end{document}
