# List of unsolved problems

This is a list of lists of**unsolved problems**in various subjects:

- Unsolved problems in mathematics
- Unsolved problems in physics
- Unsolved problems in chemistry
- Unsolved problems in biology
- Unsolved problems in economics
- Unsolved problems in governance
- Unsolved problems in cognitive science
- Unsolved problems in neuroscience
- Unsolved problems in computer science
- Unsolved problems in software engineering