### Rings in M2 with "my variables"

M2 can easily create a ring with many variables

R = ZZ[vars(0..10)]

But I need my variables to be called x1, ..., x10 (in particular, not x_i)

l = apply(10, i-> value concatenate("x",toString i))

I make strings "xi" and applying value turns the strings into symbols, the correct input for a ring:

R = ZZ[l]
gens R

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### Latex: Centering table larger than textwidth

Usually, you can center tables with \center. But when the table is longer than the \textwidth, it will be align with the left side margin. You can temporarily adjust the textwidth.

% allows for temporary adjustment of side margins
\usepackage{chngpage}

\begin{table}
\begin{center}
\begin{tabular}{|c|}
\hline
And here comes a very long line. And here comes a very long line. And here comes a very long line.  \\
\hline
\end{tabular}

\caption{This Table is longer than the text width. And its caption is really long, too. This Table is longer than the text width. And its caption is really long, too. This Table is longer than the text width. And its caption is really long, too. This Table is longer than the text width. }
\label{myTable}
\end{center}