Chapter 4 Fourier transform 54.1.2 Convergence of Fourier Transforms 1.x(O) is square integrable x(t dt < oo 2. Dirichlet Conditions 77 Chapter 4 Fourier Transform §4.1.2 Convergence of Fourier Transforms 2. Dirichlet Conditions:  ( )   + − x t dt 2 1. is square integrable x t( )