LyX ⇒ How to end a section title with a displayed formula?

[lyxrocks]

how come you cannot end a section title with a "(centered) displayed formula"?

I want something like this:

Section Name(this is of section environment)
Centered Displayed Formula (also of section environment)
Beginning of Theorem (this is of theorem environment)

but it won't compile. it would compile if i change the Displayed Formula into an "Inline" formula, but that's not what i want.

i could make the

Centered Displayed Formula

"standard" environment instead of "section" environment, but then I would have to manually increase the font of the formula every single time, which doesn't seem very sophisticated.

I uploaded the lyx file that wouldn't compile. as you can see, if you change the formula into "inline" then it compiles, but that's not what I want

thanks in advance!

[Stefan Kottwitz]

Load the module "Fix LaTeX":

fixltx2e.png (47.84 KiB) Viewed 5987 times

For explanation: when you insert displayed math formulas, LyX uses \[ ... \] which is a so called fragile environment - it breaks in moving arguments, and section arguments are moving: they are expanded and written to the .toc file, causing trouble. Such fragile commands or environments can be protected against expansion or made robust. In this case, the fixltx2e package makes it already robust, so adding the module fixes it.

Stefan

[lyxrocks]

thank you the reply!!! it does seem to fix the error, but the file still wouldn't compile due to a new error that is related to the same problem.in both of these screenshots I used the lyxquestion sample file in the OP.

error msg with Fix Latex

with.jpg (22.97 KiB) Viewed 5980 times

error msg without Fix Latex

without.jpg (37.44 KiB) Viewed 5980 times

[Stefan Kottwitz]

Perhaps try to narrow it down, and post a new topic. Btw. marking a topic as solved means clicking the checkmark button in the answer/solution, not the question. The reason is, that it creates a link from the checkmark sign to the solution, for easier browsing.

Stefan

[lyxrocks]

ok i will do that. thanks again!

[lyxrocks]

i want to point out that the fix latex module suggested by stefan_k is awesome, as far as i know, you have nothing to lose by adding it.

http://latex-community.org/forum/viewto ... 148#p70269