"a collection of problems" is a correct and commonly used phrase in written English.
It can be used whenever you want to describe a group or set of problems. Example: The math textbook contains a collection of problems for students to practice.
Indeed, the Arithmetica is essentially a collection of problems with solutions, about 260 in the part still extant.
But Mr Obama has chosen this moment to tackle a collection of problems, such as health care and environmental regulation, that have defeated much less overburdened administrations.The administration advances two justifications for this, one substantive (you can't fix America's economy without also dealing with its long-term problems) and one political ("Never waste a good crisis").
A collection of problems including channel measurements and modeling, channel estimation, and synchronization have been widely studied by researchers [5-10].
This curious document entitled directions for knowing all dark things, deciphered by Eisenlohr in 1877, is a collection of problems in geometry and arithmetic, algebra, weights and measures, business and recreational diversions.
A collection of problems has been carefully selected such that a wide variety of Froude numbers, density ratios and dominant dissipative cases are reported with the intention of presenting a general methodology, not restricted to a particular range of parameters, and capable of using large time-steps.
A collection of problems is carefully selected such that a large density ratio and complex cases under a wide variety of Froude numbers are presented with the aim of demonstrating the capabilities of the new enhanced method on a complicated moving overset grid system.
You find a collection of problem solving tools in the "Tips" section below.
You use two mind maps at a time: A problem map, where you work at your problem, and A tool map with a collection of problem solving tools.
Try to think of each problem as a collection of smaller problems (a sequence of simpler tasks) or as a repeated process of reducing the problem's scope to smaller scopes and then piling those scopes upon each other.
The latter include A Collection of Mathematical Problems (1960), Stanislaw Ulam: Sets, Numbers, and Universes (1974), and Adventures of a Mathematician (1976).
"We need to stop treating people as a collection of health problems or treatments.
