 Landweber iteration

Landweber iteration applies $u_{n+1}=u_n+\tau A^{\ast }(f-A{u}_n)$. Starting at zero,and early stopping regularizes the inverse problem.

Landweber iteration is an iterative method used to solve certain types of inverse problems, particularly those that can be framed as ill-posed problems. It is commonly applied in the context of linear inverse problems where one seeks to recover an unknown vector \( x \) from a given measurement \( b \) that is related to \( x \) through a linear operator \( A \): \[ Ax = b.