On Sun, Dec 02, 2001 at 12:12:35AM -0500, Matej Cepl wrote: > > Hi, > > I would like to add to the line of equations some explanations of > the kind [by (#)], e.g.: > > MPP_L = \fi(x)-k \fi'(x) = [by (12.50)] > = APP_L - k MPP_K [by (12.46) and (12.49)] > > However, there are only three columns in the equation editor. > What should I do?
Use an array (matrix). A better solution is to use the ams environment align or alignat. In lyx 1.1.6 you must enter it using ERT, but lyx 1.2.0 will support these environments.
