<< [[Signal Processing MOC]] [[Crystallography]] > Pepinsky's machine is a program aiming to help with the teaching of crystallographic Fourier transforms: Given a set of structure factor amplitudes for any centrosymmetric plane group, the program displays the amplitude-weighted reciprocal lattice plane and allows the user to interactively assign and modify the phases of the structure factors, while observing the effect of these changes on the corresponding electron density function ![[pep_snapshot.jpg]] [[pep_doc.pdf|Documentation]] [Download](https://utopia.duth.gr/glykos/other.html)