Beautiful equations
Panu Viljamaa, J Richard Jacobs, Chris Chris, James Mac Hyman, Matthew T. J. Halma, Eric Nolan, Paul R. Coxon · Physics World · 2014
In reply to a Physics World infographic (part of which is given above) about a study showing that Euler's equation was deemed most beautiful by a group of mathematicians who had been hooked up to a functional magnetic-resonance image (fMRI) machine while viewing mathematical expressions (14 May, http://ow.ly/xHUFi).