Am 21.11.2010 16:05, schrieb Liviu Andronic:

What should one do when the regular \not way of striking out math
produces ugly output?

Use one of the AMS negated relations available in the math toolbar. That are almost all relations one could need.

See attached example.

This file doesn't ope with LyX 1.6.x. If you are not testing LyX for bugs or development, lease use the stable LyX 1.6.x releases!

In this case I'd like to
use regular strikeout (as from within Text style), but it doesn't seem
to work on Math.

This won't work because \not is not designed to strike-out characters but to 
negate relations.
But anyway, the syntax you are using in your formula seems to be wrong. If you want to state that a variable is negated, you need to place a \neg if front of it. See the attached example file.

Another issue: you write Var_1 where "Var" is italic. This would mean
V*a*r_1 but I guess that your variable is named "Var". So to avoid confusions, write 
"Var" upright.
(Appendix A of the Math manual gives some advices about math typography.)

regards Uwe

Attachment: newfile1-fixed.lyx
Description: application/lyx

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