"a class of problem" is a grammatically correct phrase and can be used in written English
Example: There is a vast class of problems that arise when implementing new technology in a traditional industry.
From Mr. Cliquet's Web site: Some mathematical questions about origami represent a class of problem that are not solvable by our computers.
Interactive evolutionary algorithms are a class of problem solving methods in which the human factor serves as a fitness function [4].
Following the philosophy of pseudo-spectral approach, a nonlinear variable-time impulsive optimal control system design approach is presented in this paper for a class of problem with hard terminal constraint.
A unified and exact solution method is developed for the free vibration analysis of composite laminated shallow shells with general elastic boundary conditions, a class of problem which is of practical interest and fundamental importance but rarely attempted in the literature.
Blaszczynski and Nower [ 5] described a class of problem gamblers without comorbidities and minimal pathology.
The design of structures that maximise strength given certain material constraints is a class of problem that appears commonly in mechanical engineering.
In 1973, two social scientists, Horst Rittel and Melvin Webber, defined a class of problems they called "wicked problems".
First, he seems to think there is a class of problems that belong to the nation as a whole.
Today we will examine a class of problems that also rely on human visual perception, and are therefore hard for computers.
Such a class of problems is of considerable importance in large space structures.
Integration of production planning and scheduling is a class of problems commonly found in manufacturing industry.
