Template:Are You Sure/April 8

• ... that mathematician Donald Sarason made fundamental advances in the areas of Hardy space theory and Vanishing Mean Oscillation?

• ... that the Superimposed Fraunhofer (also known as Super Fraunhofer, Fraunhofer Overlay, etc.) is a German postage stamp misprint in which the image of Joseph von Fraunhofer demonstrating the spectroscope is inexplicably superimposed on the color spectrum bar, and that this misprint is a striking example of abuse of notation in the field of Gnomonic philately?