Inter-brane interactions in compact spaces and brane inflation

It has been pointed out that brane-anti-brane inflation without warped geometry is not viable due to compactification effects ( in the simplified scenario where the inflaton is decoupled from the compactification moduli). We show that the inflationary scenario with branes at a small angle in this simplified scenario remains viable. We also point out that brane-anti-brane inflation may still be viable under some special conditions. We also discuss a way to treat potentials in compact spaces that should be useful in the analysis of more realistic brane inflationary scenarios.