# Problem with automatic line break in math mode

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. • Does ${C^{1,\beta}\times C^{0,\beta}}$\penalty10000 -\hskip0pt Topology produce better line breaking? Jul 31, 2016 at 12:47 • With a long piece of mathematics that has no natural line break there is no automated solution. You could display the formula in an equation* environment, or reword the surrounding text so that the characters come in the middle of a line. Jul 31, 2016 at 12:48 • - disables line break in words that contain them, but you can manually add discretionary hyphens with \-, for instance $C^{1,\beta}\times C^{0,\beta}$-Topol\-ogy. Jul 31, 2016 at 13:03 • Dividing the word is similarly undesired. E.g., there is a situation in my text, where the "C" of $C^[1,\bet...$ marks the last sign of the line, so for TeX it should be easy to take it in the new line and rearrange the previous part of the text to fill the whole line. The fact, that this only happens when \times is uses stresses, that there should be a workaround. Jul 31, 2016 at 15:46 • you can force a line break without leaving the line short with \newline (\linebreak and \\  leave the line short) Jul 31, 2016 at 16:47 ## 1 Answer 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
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