Math & Science ⇒ Set vertical Spacing of Cases globally

[Lucas Malor]

If I write a case with fractions within, the lines of equation overlaps, and the vertical space is few without fractions too IMHO.
I added additional vertical space for all the other multiline environments via \jot and \arraystrecth, but how can I set vertical spacing for all cases?

[Stefan Kottwitz]

Hi Lucas,

cases uses a fixed arraystretch value of 1.2 internally. Here's a redefinition, showing how you optionally can change it:

Code: Select all

\makeatletter
\renewcommand*\env@cases[1][1.2]{%
  \let\@ifnextchar\new@ifnextchar
  \left\lbrace
  \def\arraystretch{#1}%
  \array{@{}l@{\quad}l@{}}%
}
\makeatother

If you need it globally, just change the default value of 1.2 for the optional argument above.

I posted this solution earlier on my blog, with more explanation: amsmath: cases and \arraystretch.

Stefan

[Lucas Malor]

Wonderful, it works. I read cases with 1.4 a lot better. Thank you.

[localghost]

Take a look at the mathtools package. It offers several similar environments with enhancements.


Best regards and welcome to the board
Thorsten

[Lucas Malor]

It seems interesting, but unlyckily I already submitted my work. If I need it in a future I'll try it. Thank you.