Is it a good idea to put equations in a research proposal? I am preparing a grant application for personal funding to carry out a 3-year project. The topic is in the field of computational condensed matter, and the work will focus on i) method development, ii) computational implementation, and iii) application of method/code to interesting systems.

I think it's easier to bring across some points by (light) use of equations, but I'm not sure if the reviewers will frown upon it. The committee members should be either experts in the particular subfield or at least fairly familiar with it (i.e., it's not a multidisciplinary committee).

This website for instance states that


  [...] the best proposals contain no equations at all!


So, is it a good idea to include equations in a research proposal or should I strive to avoid them?
While I am not a physicist (I'm a mathematician, but this doesn't particularly make me any more partial to equations), the point behind the quote on that website is that you want your proposals to be easy to understand, and not make the reviewer wade through a sea of technicalities.  Since you're writing for experts, if equations make the proposal easier to read and understand, please use them.  Everything should be made as simple as possible...