Sentence examples for a difficult problem for from inspiring English sources

Relations with the Soviet Union posed a difficult problem for Roosevelt.

The fast-moving march presented a difficult problem for the police.

This CSTR is widely recognized as a difficult problem for the purpose of control.

This problem is known as a difficult problem for two reasons.

The choice and the definition of criteria for mud selection are a difficult problem for industrials.

However, the existence of many quality metrics entails a difficult problem for determining the best output.

A deal with such a rival is important because it would resolve a difficult problem for the Federal Trade Commission.

The analysis of solid samples can often be a difficult problem for the researchers dealing with infrared spectroscopy.

Endowing an autonomous system like a robot with intelligent behavior is a difficult problem for several reasons.

However, determination of this threshold is a difficult problem even for regular topologies.

All the algorithms and proofs presented here and in the Text S1 are generalizable to the scenario where different samples have different thresholds, but specifying such thresholds remains a difficult problem open for further investigation.