Reionization constraints using principal component analysis

In this work, we try to give an overview of semi-analytical approach (Choudhury & Ferrara (2005,2006)) to study the observational constraints on reionization. We implement and investigate a method to do a detailed statistical analysis using PCA (principal component analysis) technique. We also discuss different observations related to reionization and show how to use PCA for constraining the reionization history.