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19.7 ~



The tie character, ~, produces a space between before and after at which the line will not be broken. By default the white space has length 3.33333pt plus 1.66666pt minus 1.11111pt (see Lengths).

Here LaTeX will not break the line between the final two words.

Thanks to Prof.~Lerman.

In addition, despite the period, LaTeX does not use the end-of-sentence spacing (see \@).

Ties prevent the end of line separation of things where that could cause confusion. They also still allow hyphenation (of either of the tied words), so they are generally preferable to putting consecutive words in an \mbox (see \mbox & \makebox).

They are also matters of taste, sometimes alarmingly dogmatic taste, among readers. Nevertheless, here are some usage models, many of them from The TeXbook.

Unofficial LaTeX2e reference manual