Hello, To summarize, this PR introduces an 'explicit' boolean which allows a user to selectively consider only the nonzero values in the sparse min, max, argmin, and argmax functions. Previous to this change, the user would have needed to manipulate the sparse matrix so that these functions gave the correct result when considering nonzero values. The change defaults to the existing functionality and only activates these changes if the user choose explicit=True. The implementation of this functionality is now being discussed in PR 16467 <https://github.com/scipy/scipy/pull/16467> and I would appreciate your feedback. PS: the original PR 11899 <https://github.com/scipy/scipy/pull/11899> from dloney is now closed as he has agreed we will continue the work on this one. Kind regards, Arnaud