%0 Journal Article %T Marginally Eternal Inflation %A Izawa %A K. -I. %J High Energy Physics - Phenomenology %D 2007 %I %X We examine the amount of parameter tuning to make slow-roll inflation marginally eternal by considering an R-invariant chaotic inflation as an example of one-parameter tuning in supergravity. The primordial inflation turns out to be possibly marginal in such a setup. %U http://arxiv.org/abs/hep-ph/0702127