## Wednesday, February 25, 2015

### recollapsing FLRW-universes

can you construct a FLRW-universe with dark matter and dark energy (with constant equation of state $w$) that recollapses? what's a suitable condition?

1. Sure. Lambda negative or lambda positive but $alpha$ less than 1. (See the paper by Lake on the flatness problem for a description of $alpha$.)