We show that the Green functions on flat tori can have either three or five critical points only. There does not seem to be any direct method to attack this problem. Instead, we have to employ ...

TATYANA S. VAITEKHOVICH, BIHARMONIC GREEN FUNCTION OF A RING DOMAIN, Mathematica Scandinavica, Vol. 106, No. 2 (2010), pp. 267-282 ...

It uses the method of so-called nonequilibrium Green functions: this allows movements and complex interactions of electrons to be described with very high accuracy, even for an extended period.

New evidence links residential exposure to greenspace, such as green vegetation, as a potential population-level approach to improve processing speed and attention, and overall cognitive function.