1 INTRODUCTION

2 MATTER POWER SPECTRUM FROM GALAXY SURVEYS

3 MEASURING THE ANGULAR DEPENDENCE: THE METHOD

4 VALIDATION OF THE METHOD

5 MEASURING THE ANGULAR DEPENDENCE

6 MULTIPOLE DECOMPOSITION

7 FACTORIZATION OF THE C_ℓ MATRICES

8 MEASURING THE IMPACT WITH SELECTION FUNCTIONS

9 DISCUSSION

10 CONCLUSION