Problem with automatic line break in math mode

Question

I've got a special problem with writing in math mode. In general there is absolutely no problem with, e.g., writing something like

$x+x+x++x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x+x$

will produce the required line break, whereas something like

The subset $\Xi\subseteq C^{1,\alpha\times C^{0,\alpha}$ is closed with
respect to the $C^{1,\beta}\times C^{0,\beta}$-Topology

will write the part C^{0,\beta}$-Topology of the text over the end of the line. Here it's important, that this part stands close to the end of a line. In addition, I have to mention, that an \mbox{} command will occur writing further along the end of the line.

So is there someone who knows that problem, respectively how to solve it? It's important because a manual line break yields a white space at the end of the line and this is strongly undesired.

Answer 1

The question is not clear but I assume that you get the 4th case, with the linebreak after \times

You can use \nobreak with the mathematics to stop the break there, if the break before -topology is not wanted you can force a linebreak with \linbreak (rather than \\) this does not leave the line short but instead over-stretches the line but is I think the output that you want here.

\documentclass{article}

\begin{document}

\noindent X\dotfill X

The subset $\Xi\subseteq C^{1,\alpha}\times C^{0,\alpha}$ is closed with
respect to the $C^{1,\beta}\times C^{0,\beta}$-Topology


xxThe subset $\Xi\subseteq C^{1,\alpha}\times C^{0,\alpha}$ is closed with
respect to the $C^{1,\beta}\times C^{0,\beta}$-Topology

xxxxxThe subset $\Xi\subseteq C^{1,\alpha}\times C^{0,\alpha}$ is closed with
respect to the $C^{1,\beta}\times C^{0,\beta}$-Topology

xxxxxxxxThe subset $\Xi\subseteq C^{1,\alpha}\times C^{0,\alpha}$ is closed with
respect to the $C^{1,\beta}\times C^{0,\beta}$-Topology


xxxxxxxxThe subset $\Xi\subseteq C^{1,\alpha}\times C^{0,\alpha}$ is closed with
respect to the $C^{1,\beta}\times\nobreak C^{0,\beta}$-Topology


xxxxxxxxThe subset $\Xi\subseteq C^{1,\alpha}\times C^{0,\alpha}$ is closed with
respect to the\linebreak $C^{1,\beta}\times  C^{0,\beta}$-Topology
\end{document}