Kayvan A. Sylvan wrote:

> On Tue, Apr 19, 2005 at 08:37:14PM -0400, Myriam Abramson wrote:
>> 
>> Hi!
>> 
>> How do you write a case equation in LyX? I mean an equation like
>> 
>> B = { 1 if x > 0;
>>       0 if x = 0
>> 
>> so that the brace covers multiple lines?
> 
> I think that you can use the math panel and then click on the button that
> looks like a blue box surrounded by brackets. Then you can change the
> left bracket to your braces and change the right one to blank.
> 
> In the inner blue square, insert a math matrix and fill in the parts.

Actually, it's even easier:

Create a math inset: Insert->Math->Display formula
Type:
    B=\cases<space>1<right arrow>\textrm<space>if <Insert->Math->Inline 
formula>x>0<right arrow><right arrow><cntl-enter><down arrow><left 
arrow>0<right arrow>\textrm<space>if <Insert->Math->Inline formula>x=0<Esc>

Looks horrible, but really it isn't!

-- 
Angus

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