Abstract
The cluster autocorrelation function Xi(c) and the galaxy-cluster cross-correlation Xi(gc) are used to test the biased structure formation in several scenarios. A scale-free spectrum can reproduce the observed Xi(c), but it is in contradiction to Xi(gc). On the other hand, acceptable results are obtained for Xi(gc) in cold dark matter scenarios with adiabatic and isocurvature fluctuations. However, these scenarios are rejected on the grounds of Xi(c). 42 references.
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