Lists of unsolved problems

List of unsolved problems may refer to several notable conjectures or open problems in various academic fields:

Extends: [Lists of unsolved problems](https://wikipedia.org.ai/Lists of unsolved problems), [Open problems](https://wikipedia.org.ai/Open problems), [Science-related lists](https://wikipedia.org.ai/Science-related lists), [Lists of problems](https://wikipedia.org.ai/Lists of problems), Engineering