1 INTRODUCTION

2 THE COVARIANCE MATRIX OF GALAXY COUNTS AND THE CLASSICAL APPROXIMATION

3 FISHER MATRIX IN THE LANGUAGE OF QUANTUM MECHANICS
3.1 Exact Fisher matrix
3.2 Approximate expressions
3.3 Generalized FKP formulas

4 ANALYTICAL FISHER MATRIX FOR A TOP-HAT VOLUME-LIMITED SURVEY
4.1 Analytical solution: top-hat profile
4.2 FKP formulas: the stationary phase limit
4.3 Analytical solution for two species of tracers with top-hat density profiles, including the cross-correlations

5 DISCUSSION