line-breaking
I have this code:
\subsection{Definitions}
\subsection{Two important results}
\textbf{Proposition}. Let $(\mathbb R^{n},d)$ be a metric space and suppose $X,Y\subset \mathbb R^{n}$ are compact subsets. Then $X\cup Y$ is compact.
What I want to get is a newline after the subsection. I have tried adding \\ and it doesn't work. Also, it doesn't seem to recognize \newline.
Help would be appreciated.
You should hardly ever need to use explicit spaces in a latex document, spaces should be under the control of structural commands such as lists and section headings.
However \medskip is short for \vspace{\medskipamount} and use of \vspace in horizontal mode has a slightly odd effect that the space comes after the current line. This is almost always not what you want so \vspace if it is used at all is best used with a blank line before it, to get into vertical mode, so the space comes between paragraphs.
\\ in the center environment is redefined so that it does \par internally but in most other cases you are not in vertical mode after \\. Perhaps you are looking for \\[\medskipamount]
The markup for a paragraph break is a blank line, not \\ :
\documentclass{article}
\usepackage{parskip}
\begin{document}
\section{First section}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum sit amet nibh
convallis, interdum dui vitae, ultrices urna.
Vestibulum lobortis, mi vitae
hendrerit pulvinar, nunc mauris dapibus dui, sed hendrerit mauris leo in magna.
\end{document}
Best Answer
Add the following code;
after the
\subsection{...}command. The\hfillfills the line with empty space, so that\\can end this line without an error.