Stuart, Charles AlexanderZhou, Huan-Song2008-12-102008-12-102008-12-10200510.1112/S0024610705006873https://infoscience.epfl.ch/handle/20.500.14299/32486WOS:000232747700009Schrödinger operatorpositive eigenfunctionsPositive eigenfunctions of a Schrödinger operatortext::journal::journal article::research article