\newtheorem{problem}{Problem} \theoremstyle{definition} \newtheorem{solution}{Solution}
...
Hmm, Overleaf is a web-based LaTeX editor, right? So maybe the user wants a template or a way to write up solutions in Overleaf, possibly with the solutions already filled in. Alternatively, they might want a way to automatically generate solutions or have a repository where others can contribute solutions, which Overleaf supports with real-time collaboration. dummit+and+foote+solutions+chapter+4+overleaf+full