12.6 @tie{}: Inserting an Unbreakable Space

The @tie{} command produces a normal interword space at which a line break may not occur. Always write it with following (empty) braces, as usual for commands used within a paragraph. Here’s an example:

@TeX{} was written by Donald E.@tie{}Knuth.


TeX was written by Donald E. Knuth.

There are two important differences between @tie{} and @w{ }: