He views that situation as a problem.

A new approach is needed to solve this set of problems.

The main problem with this project is the lack of communication.

This question text is too difficult, it's hard to understand.

Graph theory is a branch of mathematics that studies mathematical structures called graphs.

Theoretically, this experiment should succeed.

Information theory is a field of study that mathematically analyzes the amount of information and the efficiency of its transmission.

He is particularly interested in game theory within economics.

He is writing a paper on coding theory.

He is known as an excellent theoretician.