1 INTRODUCTION

2 FORMALISM  
2.1 Power spectra and Correlation functions  
2.2 Multipoles  
2.3 Projected correlation functions  

3 DATA  
3.1 Simulated data: Illustris TNG  
3.2 Real data: SDSS  

4 METHODS  
4.1 Measuring correlation functions  
4.2 Covariance matrices  
4.3 Fitting to models  

5 RESULTS  
5.1 Results from SDSS data  
5.2 Results from the simulation  

6 CONCLUSIONS