Sentence examples for several unsolved problems from inspiring English sources

However, there still exist several unsolved problems.

However, there still were several unsolved problems, most notably the description of superconductivity and the Kondo effect.

Several unsolved problems, such as name-space issues, imprecise or incorrect annotations, will interfere with eGSA results.

Mathematics has several notorious unsolved problems, and the puzzle posed by the French number theorist Pierre de Fermat over 350 years ago is one of the most notorious of them all.

Several unsolved stream depletion problems are also recommended.

After examining these case studies, I conclude by describing some unsolved problems and present several suggestions for future research and development to solve these problems.

Unsolved problems are formulated and several recommendations for the antenna designs are presented.

Understanding why aftershocks occur is one of the major unsolved problems in seismology, and several generation mechanisms of aftershocks have been proposed.

Unsolved problems remain.

This problem became one of the most important unsolved problems in algebraic topology.

Inspiration: Unsolved problems.