My book “Mathematics under the Microscope” reached the production stage at the American Mathematical Society publishing branch. One of the few last decisions that I will have to make is a choice of a picture for the front cover. Please send me suggestions! I need a nice clean image which acts as a symbol of non-formal, creative aspects of mathematics. Crucially, the image should also be copyright clean. My warmest thanks in advances!
And this is my photograph for the back cover: