baselinestretch and equation vertical spacing

Hi everyone,

I'm writing my thesis (as everything else in latex), but I found a problem in using \baselinestretch and the equation environment.

When I define the vertical line spacing like this:

\renewcommand{\baselinestretch}{1.3}\normalsize

all of my equations in the thesis become unevenly vertically aligned. I get (1.5) line spacing that looks great, but how can I make the equations have equal vertical spacing above and below the paragraphs?

Thanks,

Tomislav

P.S.

I have googled it a lot and I've tried

\renewcommand{\arraystretch}{1.2}

but that is just for tables and other similar stuff.