diff --git a/exercise/4. Inverse Problems/exercise4.zip b/exercise/4. Inverse Problems/exercise4.zip new file mode 100644 index 0000000..e5005b5 Binary files /dev/null and b/exercise/4. Inverse Problems/exercise4.zip differ diff --git a/lecture/7. Iterative Reconstruction/7. Herleitung CG Verfahren.pdf b/lecture/7. Iterative Reconstruction/7. Herleitung CG Verfahren.pdf new file mode 100644 index 0000000..c6b6dd3 Binary files /dev/null and b/lecture/7. Iterative Reconstruction/7. Herleitung CG Verfahren.pdf differ diff --git a/lecture/7. Iterative Reconstruction/7.IterativeReconstruction.pdf b/lecture/7. Iterative Reconstruction/7.IterativeReconstruction.pdf new file mode 100644 index 0000000..cb7ef4c Binary files /dev/null and b/lecture/7. Iterative Reconstruction/7.IterativeReconstruction.pdf differ