%0 Journal Article %A M. R. Gavrilovich %A V. L. Kreps %T On a class of optimization problems with no ``effectively computable'' solution %J Zapiski Nauchnykh Seminarov POMI %D 2015 %P 122-135 %V 436 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2015_436_a6/ %G ru %F ZNSL_2015_436_a6