Text within Equation

[Herbert Voss]

Am 02.08.24 um 13:30 schrieb Alexander Dunlap:
> On Fri, Aug 2, 2024, at 1:47 AM, A-Imam Al-Sammak wrote:
>> Dear all
>> I need to type something like the following formula in LyX where I 
>> have a mixture between normal text and math
>>
>> image.png
>>
>> I know we can use normal ALL math symbols in an equation and also we 
>> can use ALL text fraction, but I don't know how to use a mixture of 
>> them as illustrated in the example above. Any help on this issue?
>
> You can use the \text or \mathrm macros around the parts you want to 
> be text. \text will copy the text style of the outside environment, 
> while \mathrm will force the text to be Roman style.

\mathrm takes the glyphs from the math font, whereas \text or \textrm 
takes it from the text font.
If text and math font are different you may see it in the output.

Herbert