--- a
+++ b/docs/user/problems.rst
@@ -0,0 +1,24 @@
+Biological Problems
+~~~~~~~~~~~~~~~~~~~
+.. module:: moscot.problems
+.. currentmodule:: moscot.problems
+.. autosummary::
+    :toctree: genapi
+
+    time.TemporalProblem
+    time.LineageProblem
+    space.AlignmentProblem
+    space.MappingProblem
+    spatiotemporal.SpatioTemporalProblem
+    cross_modality.TranslationProblem
+
+Generic Problems
+~~~~~~~~~~~~~~~~
+.. module:: moscot.generic
+.. currentmodule:: moscot.problems
+.. autosummary::
+    :toctree: genapi
+
+    generic.SinkhornProblem
+    generic.GWProblem
+    generic.FGWProblem