The Relic Problem of String Gas Cosmology
  We discuss the relic problem of string gas cosmology (SGC) using gravitinos
and magnetic monopoles as examples. Since SGC operates near or at the Hagedorn
temperature, relics are produced copiously; in the absence of dilution, their
abundances are too large. A subsequent phase of reheating can solve the
gravitino problem, but fails to dilute monopoles sufficiently. We propose a
subsequent phase of inflation as the most natural solution to the monopole
problem; unfortunately, inflation marginalizes almost all potential
achievements of SGC, with the exception of a possible explanation of the
dichotomy of space (why did only three dimensions inflate?).
