Problem in twocolumn article below table in latex - latex

Question

I faced a problem writing a twocolumn article in latex. I incorporated a regular table in singlecolumn mode, but when i change it back to doublecolumn below the table, when the text or the proof is large enough to start the second column, it goes over the table , which means that the second column starts at the beginning of the page as if the table doesnt exist. I left as comments the commands that i tried but didnt work.
thank you for your time.
\documentclass[10pt,twocolumn]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[greek,english]{babel}
\usepackage{alphabeta}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{tabularx}
%\usepackage{wraptable}
%\usepackage{wrapfig}
%\usepackage{graphicx}
\usepackage{multicol}
\usepackage{makecell}
\usepackage{amsthm}
%\addto\captionsenglish{
% \renewcommand{\contentsname}{Ξ Ξ΅ΟΞΉΞ΅ΟΟμΡνα}
% }
\newenvironment{absolutelynopagebreak}
{\par\nobreak\vfil\penalty0\vfilneg
\vtop\bgroup}
{\par\xdef\tpd{\the\prevdepth}\egroup
\prevdepth=\tpd}
\author{text}
\title{text}
\date{5/4/2021}
\begin{document}
\maketitle
\section{text}
\par
text
\section{text}
\par
text
\section{text}
\par
text
\section{text}
\par
text
%\newpage
%\begin{absolutelynopagebreak}
\onecolumn
%\end{absolutelynopagebreak}
%\begin{wrapfig}
\begin{table}[t]
\caption{text}
\centering
\begin{tabular}{|m{4cm}|m{4cm}|m{5cm}|}
\hline
text & text & text\\
\hline
text & \parbox{3cm}{\begin{equation*} equation \end{equation*}} & text\\
\hline
text & \parbox{3cm}{\begin{equation*} equation \end{equation*}} & text\\
\hline
text & text & \makecell{text \\ text}\\
\hline
text & \parbox{3cm}{\begin{equation*} equation \end{equation*}} & \makecell{text\\text}\\
\hline
\end{tabular}
\end{table}
%\hrulefill
%\vspace{1cm}
\begin{absolutelynopagebreak}
\twocolumn
\end{absolutelynopagebreak}
\section{text}
% \vspace{10cm}
%\hrulefill
%\clearpage
% {\Large \textbf{5\hskip 0.6cm \selectlanguage{greek} text \textlatin{Maxwell}}}
%\par
\begin{proof}
\begin{equation}
equation
\end{equation}
\begin{equation}
equation
\end{equation}
\begin{equation}
equation
\end{equation}
\begin{equation}
equation
\end{equation}
\end{proof}
\\
text
%\end{wrapfig}
\end{document}

Answer 1

Instead of explicitly switching the text from one column to two columns back and forth within a page, you can use the starred (*) version of the table environment. That will make this table one-column, while the text stays as it is.
\documentclass[10pt,twocolumn]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[greek,english]{babel}
\usepackage{alphabeta}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{tabularx}
\usepackage{multicol}
\usepackage{makecell}
\usepackage{amsthm}
\usepackage{lipsum}
\author{text}
\title{text}
\date{5/4/2021}
\begin{document}
\maketitle
\section{text}
\par
text
\section{text}
\par
text
\section{text}
\par
text
\section{text}
\begin{table*}[t]
\caption{text}
\centering
\begin{tabular}{|m{4cm}|m{4cm}|m{5cm}|}
\hline
text & text & text\\
\hline
text & \parbox{3cm}{\begin{equation*} equation \end{equation*}} & text\\
\hline
text & \parbox{3cm}{\begin{equation*} equation \end{equation*}} & text\\
\hline
text & text & \makecell{text \\ text}\\
\hline
text & \parbox{3cm}{\begin{equation*} equation \end{equation*}} & \makecell{text\\text}\\
\hline
\end{tabular}
\end{table*}
\lipsum[1-3]
\section{text}
\lipsum[1-3]
\begin{proof}
\begin{equation}
equation
\end{equation}
\begin{equation}
equation
\end{equation}
\begin{equation}
equation
\end{equation}
\begin{equation}
equation
\end{equation}
\end{proof}
\lipsum[1-2]
\end{document}
The result: