Terms for subject Mathematics containing problem class

English	Russian
... for a quite general class of problems	для достаточно широкого множества задач
many general classes of PDE arise from problems in differential geometry	возникают из задач дифференциальной геометрии
problem class	класс задач (there are a number of techniques for extending this problem class at the expense of an increase in computing cost)
there are a number of techniques for extending this problem class at the expense of an increase in computing cost	расширение класса (задач)
there are a number of techniques for extending this problem class at the expense of an increase in computing cost	вычислительные затраты