Abstract
The combination of inflation and cold dark matter (CDM) has been very successful in explaining the formation of large-scale structure and of galaxies. But problems at small scales do exist, among them: (1) The missing satellites problem: CDM produces too many small galaxies, e.g. about five times as many satellites as are observed in the Local Group (Moore et al., 1999; Klypin et al., 1999; Kamionkowski and Liddle, 2000). (2) The angular momentum problem: Galaxies in CDM simulations consistently have smaller specific angular momenta than is measured, giving disks which are too small (Sommer-Larsen and Dolgov, 2001 and references therein).
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